First antenna efficiency will begin to drop off at dipole lengths significantly less than a half wave length for the lowest frequency band to. How to use the plant calculator. Calculate small appliance power. UPS Ground shipping is 2-5 days, so you can expect your antenna in about 6-9 business days, depending on your location. Design details can be found in an earlier article. "Without CMRP able to roll these channels to my specifications, there was no way this beautiful round antenna would have ever worked. A coil with an electrical length in-between 90° and 180° (and odd multiples of this) will behave like a capacitor instead of an inductor. Note: Actual length depends on conductor diameter and end effects. sharing antenna • A pulse is transmitted and then the radar listens for the return • The strength of the signal is proportional to the target distance and its electrical size • The range is calculated from the time delay Single antenna Time shared by the transmitter and receiver CW Radar with independent Transmitting and Receiving antenna. Unit Conversion Calculator Pasternack's Unit Conversion Calculator allows you to convert common metric and standard values, such as weight, length, power, temperature and torque. Here are some of the characteristics of the two antennas. The length parameter in this calculator is only used to calculate the resistance, voltage drop, and power dissipation, but does not enter into the IPC-2221 temperature rise calculation. The length should be between 0. I have theta and phi values of E field for a particular frequency. How To Build A QFH (Quadrifilar Helix Antenna) to Download Images From Weather Satellites | Prepper's Survival Homestead February 20, 2016 at 9:08 pm (UTC 0) Link to this comment […] here to view the original […]. 0′ of the tube went through the thrust bearing to the Ham-IV rotor. Speed of wind - a fundamental atmospheric rate, wind speed measured by anemometers is the rate at which wind covers distance. to their length and the operating wavelength, and transmission line feeding and matching arrangements are used in place of lumped elements and ATUs. Fortunately there is a starting formula for these types of antennas. CALCULATION OF UNDESIRABLE ANTENNA LENGTHS For 80 meters (3. Vertical Antenna Calculator. Wire Antenna Design Lengths. 4 GHz wireless systems. The antenna has five elements on a 64″ boom. Frequency and wavelength of radiations are related to one another through the speed at which light travels. Discover what features and technology this model has to offer. The antenna calculator is a very simple and easy piece of software. and then 5 % is subtracted from that number to get the inverted V lengths. single antenna, the picture is a bit different. First, your antenna is now a combination of an inverted vee and a vertical running down the center of the vee. Seeing as it's tolerance is to the nearest 1/16", it's no good for small projects such as jewlery boxes. Understanding the theoretical and comparing this to the field results is the beginning of a life long enjoyment of antenna experimentation. The author then divided it by 4 to. Calculates the bandwidth of a digital signal and maximum trace length, using the IPC-2251 method or the frequency domain method, for transmission line effects. How does this wavelength calculator work? This is a tool you can use to estimate the distance from one wave peak to another when you already know the frequency and the wave velocity or speed. 1225m = 12cm. The K5HH Antenna Calculators are for demonstration purposes only and may not reflect actual numbers for your equipment. This antenna design has been specially developed for the range of radio waves from High frequency up to the upper UHF-band. Vertical Quarter-Wave Antenna Length Calculator. Enter the diameter of the conductor. hand-build the antennas are anti-metric activists, and require that all lengths be specified in inches (1 inch = 0. Usefull when building an antenna. Your dipole's total length is feet. Calculate the reactions at the supports of a beam, automatically plot the Bending Moment, Shear Force and Axial Force Diagrams Toggle navigation BEAM GURU. VE3SQB ANTENNA DESIGN PROGRAMS EN82NE. The best G/T (gain divided by noise) is at an F/D of 0. This tool is designed to calculate the inductance of a coil of wire given the number of turns, the loop diameter, wire diameter, and the permeability of the medium. Note that this is the spacing between the centers of the plants, so, if you plan for your trees to grow, leave some extra space. There are usually four radials, three being a minimum, but you could use up to six. Learning how to calculate dimension is easy and will give additional knowledge that can be used to improve life. 54mm) from Mill-Max Manufacturing Corp. It's strong enough to hold up pretty well to the wind, and becomes almost invisible after a few weeks in the weather. Let's see some antenna calculator and antenna design software that will help you design faster and better. This program overestimates the length if the conductor diameter is larger than 1/20 wavelength. PHP Helical Antenna Calculator. Long yagis are commonly used from the 144MHz amateur band to the 2. 9! The beginning of the wire (L1) goes through the suspension hole, then back to the main wire (L3) and then to the connecting terminal of the balun. This line of sight calculator calculates how far the horizon is from an antenna placed at a particular height. Dipole Antenna calculator. 5 Hz 0402 Surface Mount Capacitor (0. I have made several coax baluns and the actual electrical length has never been exactly what the calculations said it should have been. Enter the formula for the antenna: divided by Freq. Place a 1:1 Balun on the Antenna end of the Feedline. ©2013 American Fastener Technologies Corporation Nine Frontier Drive, Gibsonia, PA 15044 - 7999 U. Then take the length in meters and multiply by 3. The height of the antenna is 10 ft. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them. Fix the wire in place with cable ties. Estimated Gain is 8. -Viewing Distances based on Visual Acuity: These distances are calculated based on the resolving power of the human eye ( reference) , or visual acuity. Calculate Radio Horizon, Center of Vertical Beam horizon and 3 dB point beam horizons. The antenna pattern metric generated by the amplitude adjusted modified holographic pattern is measured in process block 745. Aspect ratios >=25. The example given was for a Bluetooth antenna with a frequency of 2450MHz. 300/frequency in mhz gives length in meters. Calculating antenna gain from measured data? I have measured antenna data in far field and I want to analyze it using matlab. The hexagon is the highest regular polygon which allows a regular tesselation (tiling). Urgent questions should be send via email. Wire antennas need to be made a bit long and cut to resonance. Complex Areas: If your play or landscape area is a more complex shape, the easiest thing to do is divide the area into smaller rectangles, calculate the area of those rectangles using the formula above, then add all the rectangles together for the total square footage of the area. 4 GHz wireless systems. 5 with no velocity factor. EH Antenna Web Site www. This is post #995 in a continuing series called "Simple Ham Radio Antennas. 2: Click the Convert button. The antenna pattern metric generated by the amplitude adjusted modified holographic pattern is measured in process block 745. This program will read as its input a frequency in megahertz, and calculate and display the optimum length for an antenna to receive signals of that frequency. 45, so most TVRO antennas were built with this rather flat shape. Antenna EiRP calculator Calculate Antenna & Cable losses. Even zip cord such as what is used for lamp cords will perform quite well. You would have 50 cycles over 340 metres. Calculate Amperage, Distance, Wire Size or Voltage Drop. The conductors being massive or hollow does not affect the characteristic impedance. Things to notice: try frequencies 149. 001N2D/((228D/2) + 254l) Where: L is the inductance in henry's. Amateur Radio Antenna Length Chart - Great table to include in your ARES / EmComm response guide. If the wire is 110 feet, 8 inches long, round it up to 111 feet. Aspect ratios >=25. The calculated J-Pole measurements. Calculate the length of a FM antenna, to match the wavelength. The length of the antenna on a typical 2. We use metric, and can fairly easily calculate the length of wire antennas directly. Because the antenna is 4-sided, the polygonal option is chosen from the Coil Shape menu, and 4 is entered into the No. The antenna diameter was not transfered in the template function in the microwave worksheet. GRPs, TRPs, Reach and Frequency. Single layer air core inductor calculator. A handy tool for calculating roof lengths, cutting angles, stair angles, etc. standard whip antennas which can be as large as a meter in height. Now you can read the correct pipe size (in mm diameter) in the table. Order today at CPC Farnell - MPN: FX-115MSPLUS. Calculate distance to horizon (smooth earth) feet, antenna height miles 13. Dipole Antenna calculator. The K5HH Antenna Calculators are for demonstration purposes only and may not reflect actual numbers for your equipment. In-store pickup & free 2-day shipping on thousands of items. Calculating the length of an Antenna. However, ultimate responsibility for the proper use of your equipment lies with you. So go out and see where there is space to fit a 10 meter long antenna with your metric tape. ANTENNA SWITCH Easily switch your coax antenna connection to a second backup antenna. It is equal to 100 centimeters, 1/1000th of a kilometer, or about 39. This is about 1 full wavelength of wire. The Electro-Metrics EM-6905 41" Active Vertical Antenna includes an amplifier that results in high sensitivity to the electric field in the frequency range of 1 kHz to 200 MHz. Octagon Layout Calculator WHAT IS IT? It's a carpenter's aid for laying out a perfect octagon. Choose from quarter-wave, half-wave, the powerful 5/8-wave, 3/4-wave, or full-wave, and calculate minimum lengths of required radials, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, wire, coax, connectors, and other parts and. What is the total length of wire needed to attach the TV antenna to the actual roof? Enrichment Extension: 5. The fusing current (where the wire melts) is estimated for each gauge. Slot Length Calculation from Stegen curves: Slot Length enter taper admittance here Waveguide Slot Antenna Calculator Slot in wavelengths Estimated Performance dB deg Beamwidth= Gain = End space is from shorted end to center of last slot Slot spacing center to center updated 5/30/2002 CORRECTED OFFSET ** ** correction from Petr Kauler kauler. An antenna with coils might be designed for UHF or 700/800 MHz, but VHF reception will be compromised even though the antenna might be the same 15 inch length. Antenna Calculator. 66, 70hz = 4. EH Antenna Web Site www. 0 wavelength from the base, at a maximum of the H field in the waveguide. The most widely used formula to calculate the approximate overall length of wire required for a dipole is: 468 / frequency (MHz) = length of wire in feet. 0 for long flat plates and 1. Build A 9 dB, 70cm, Collinear Antenna From Coax Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. Listed under the Antennas/Antenna Calculators category that is about Antenna design calculators. Notice the resultant wavelengths. 308/f for metric):. It assumes there is nothing between the radio signals and the antenna horizon. The Antenna. Wavelength Calculator can be found here for free. Fill in 3 of the 4 fields listed below to retrieve the 4th. The first slot is centered 1. Geometry of the dipole antenna on the EBG substrate. Tie Rod Length Calculator How a bolt is made Follow an order of F1554 Grade 36 headed anchor bolts through our manufacturing facility and see how we make these popular bolts. Conversions of length and distance are performed by using a conversion factor. For example, the wavelength for a 146 MHz signal is 2. , 1 second), the mid-term antenna metric difference measures a difference in the antenna metric over a medium length time period that is longer than the short time period (e. If a wave travels exactly the length of an antenna from one end to the other and back during the period of 1 cycle, what is the length of the antenna? 5. In this mode, the helical antenna has the maximum directivity along its axis and radiates a circularly-polarized wave. It will then go into how semiconductor advancements are helping to achieve the goals of improving SWAP-C for electrically steered antenna followed by examples of ADI technology that make this possible. In this situation, it's a good idea to make the antenna resonant at the lowest frequen- cy you plan to use it on (that's where the antenna is longest, because antenna length is proportional to wavelength). d = Cable length in m fc = Cutoff frequency at (−)3 dB treble loss in Hz Zout = Output impedance of microphone, source impedance Cspec = Capacitance in pF per m cable length C = Cspec × d 1 pF (Picofarad) = 10 −12 F (Farad). This works very well with #18 to #12 wire sizes. Further calculator information is available in About our calculators. 86 and so on. Learn more about wire resistance calculations here, and visit Cirris Systems today! Wire Resistance Calculator & Table. be sure to check out our new power conversion calculators • power conversion calculators • ohm's law for ac and dc • amateur radio antenna/feed length charts • metric conversions • motors & mechanical. Calculate the wavelength of any frequency. Clear the form to make new entries. Start with a longer antenna length and adjust the legs in equal increments for minimum VSWR. Linear momentum, p, is defined as the product of mass and velocity: p = mv. Seeing as it's tolerance is to the nearest 1/16", it's no good for small projects such as jewlery boxes. Fréquence Radio Ham Radio Antenna Radio Band Radio Shop Radios Hams Radio Amateur Code Wallpaper Qrp. The Antenna. 2 for long cylinders. Alternatively, computer programs can calculate fields in the whole room. 78M, your radiation resistence is about 55 Ohms. Enter the values for the original width (W 1) & original height (H 1) on the left. A meter, or metre, is the fundamental unit of length in the metric system, from which all other length units are based. Calculate the length of a FM antenna, to match the wavelength. Also, write the equation you used to solve for λ. Electrically the J-Pole is a half wavelength antenna that is end-fed by a quarter wavelength stub to achieve a feed point impedance of 50 Ohms. It uses the standard formula, 585/f (178. single antenna, the picture is a bit different. This length was not the result of calculation, it was rather available as reserve which I bent together with the radiating wire. The fusing current (where the wire melts) is estimated for each gauge. 2: Click the Convert button. 308/f for metric):. With the loop tuned properly to resonance and facing in the right direction, the results achieved seemed comparable with a J-Pole antenna used at the same height. The Canadian Wood Councils Dimension Calculator has been developed for information purposes only. Collinear antenna building, by Karl Shoemaker, AK2O. It won't increase your gain, but will help the antenna hear better. 8 and 468 with 95% end effect factor. Cirris Systems provides you with a calculator to measure wire resistance. A dipole is basically a length of conductor (wire) split into two portions and signal is taken off at the split. It just goes to prove that you should always ask questions instead of blindly following what everyone else is doing. Whether you're trying to move from imperial measurements to metric, solve for Ohm's law, or make sure you've got the correct weight, these tools are designed to help. Because the antenna is 4-sided, the polygonal option is chosen from the Coil Shape menu, and 4 is entered into the No. " Now that propagation is favoring the lower HF Amateur Radio Bands (160-40 meters), it may be a good idea to redesign your 40 meter dipole antenna to accommodate the 80 meter (3. • Built DL6WU 1982 Article Based Antenna in 1986 • Gain Measured at Central States VHF Society MiiSLiMeeting in St. This calculator will estimate the power lost in the wire and the weight of the wire (copper weight only). 3, 11/18/2010. Just use the antennas with a wire whip. YOUR ACTUAL CONFIGURATION, LOCAL ENVIRONMENTAL FACTORS AND LOCAL LAWS AND REGULATIONS MUST BE REVIEWED BY A PROFESSIONAL ENGINEER BEFORE INSTALLATION. Enter F and F (GHz) Metric (millimeters) English (inches) Advertisement. This app does nothing more than the standard 468/freq (MHz) type calculations. It is equal to 100 centimeters, 1/1000th of a kilometer, or about 39. Ham Radio Basics--Dipole Antenna Center Insulator - Duration: 9:30. 792458 wavelength in meters. For a hundred years the amateurs have made more breakthroughs in antenna design than the professionals. The Canadian Wood Councils Dimension Calculator has been developed for information purposes only. It assumes there is nothing between the radio signals and the antenna horizon. All of this fits perfectly with real life antennas. The calculated results are only to be used as a guide and cannot be guaranteed, entering incorrect values will result in an invalid result. The top supplying country or region is China, which supply 100% of antenna extension pole respectively. (Collinear Design) A calculator for deriving the lengths of tubing to be used for the construction of a Super J-Pole Antenna. For example, if you found the height of a light pole to be 25 meters and you know that you are 200 meters above sea level, then the elevation of the light pole is 225 meters. Click on any unit to go to the corresponding instant conversion page. MHZ Percent smaller for an Inverted Vee. For best result, adjust the length of the antenna to get the smallest SWR, or adjust loading coil for the best matching impedence. Enter the diameter of the conductor. Question 45575: Towering Antenna. However, ultimate responsibility for the proper use of your equipment lies with you. 99792458 wavelength. BOSE Acoustic Wave Music System CD-3000 Radio Works Great Parts Repair PLS READ,Projector Lamp Module Replacement for Sanyo PLC-SU60 / PLC-XC10 / PLC-XU60,Pioneer pnx-378 Turntable Cover / Front Plastic Door PL-88F NOS. The unity gain 1/4 wave 15 inch VHF antennas are also very inexpensive. Calculator Use. Air Core Inductor Inductance Calculator. 78M, your radiation resistence is about 55 Ohms. A simple angle calculator for Right-angled triangles. Antenna feedline choice is optional, but you should consider the output matching capability of the transmitter. Equipped with a portable antenna and a 38cm pure copper dual-frequency high-gain antennas (Twice the Antenna Performance) significantly improve the quality of radio signals, Built-in high-power speakers, using acoustic technology 9-level noise reduction settings make the call louder and clear. The weight of the wire is estimated based on the length, gauge, and material. The formula for calculating the approximate length of a dipole is: Dipole length in feet: 468 / frequency in MHz Dipole length in meters: 143 / frequency in MHz These are only approximate values. I have, in good faith, given my best efforts to provide a calculator that will save ham operators time in setting up their antennas. Note: Actual length depends on conductor diameter and end effects. The gain peaks at a length of 6000 feet. Calculate small appliance power. In the calculator mentioned below, you can calculate the area of a circle. The Antenna. Then take the length in meters and multiply by 3. 1/4 wave length antenna To calculate the wavelength of a frequency. Wavelength to Frequency Calculator. 00 meters/2 = 2. Calculate the reactions at the supports of a beam, automatically plot the Bending Moment, Shear Force and Axial Force Diagrams Toggle navigation BEAM GURU. Wavelength Calculator can be found here for free. The drag force is a function of the fluid velocity and density along with the object's reference area and drag coefficient. Order today at CPC Farnell - MPN: FX-115MSPLUS. While the formula to calculate network availability is fairly simple it can be tricky to determine what should be included in the calculation. Enter the maximum ERP, in kW Enter the radial ERP in kW, or relative field value (0. 422GHz) means:. 73 in: Width (Metric) 120. Don’t get me wrong, detail is great in understanding where your money is going, but when it comes to actually doing your taxes. Click once on the map to place the first marker and then click again to position the second marker. The drag coefficient may further be a function of the Reynolds number. During combat operations, the whip antenna can become entangled, damaged or destroyed, causing a degradation or loss of communications. You can quick and easy design the professional looking plan of the soccer field with set up dimensions. Make sure you twist the inner core and outer braiding together though. Geometriy is not that critical. #1 Cable Wire Company Paige Electric Company has engineered, fabricated and inventory managed the complete spectrum of electrical and electronic wire, cable, cable assemblies, and accessories since 1958. Cable Length. Antenna Dish Designs 2D & 3D: In this, I am going to explain how to draw an Antenna dish 2D model in AutoCAD software. Click on the "Calculate" button to solve for all unknown variables. Greenlee CLM-1000 is designed with 20 pre-programmed wire sizes, 8 user programmable sizes, and is designed to measure insulated copper and aluminum conductors. org - online conversion calculators online metric convertion calculators - temperature, length Automotive Converters and Calculators Conversion calculators : metric to english and english to metric. The half-wave dipole is very simple to construct. 802-10-064-10-001000 – Connector Header Through Hole 64 position 0. Yagi antennas are very popular because of their simplicity and relatively high gain and are commonly referred to as high directive antennas. Using a pocket calculator to divide the millimetric lengths given in the figures by 25. This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. Antenna EiRP calculator Calculate Antenna & Cable losses. Enter the diameter of the conductor. If the wire is 110 feet, 8 inches long, round it up to 111 feet. Simplified Office Software - Voltage Drop Calculator. GE Range and Signal Strength Calculator - 1952 This General Electric slide chart is double sided with a plastic cover over a cardboard slide card. Just enter one side and the rest of them will be calculated so you have the whole layout. Cai and Xuemin (Sherman) Shen Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1. Metric and SAE; Snap-on ®, Mac ®, Matco ®, etc. At some length a little under a half-wave, the imaginary part of the dipole's impedance will be zero, so the impedance will be considered real. The Balun matches the Balanced Antenna into the Unbalanced Coax Cable. Actual resonant antenna lengths can vary with antenna height, ground conductivity, and proximity of surrounding objects. , Wisconsin "My customer has installed several truck loads worth of 36" x 160# WF beams you rolled and cambered for us. Calculate small appliance power. This report provides a comparison of a number of dipole antenna element designs, which could be used in the LWA. The required length of the can is dependant on the can's diameter. " Now that propagation is favoring the lower HF Amateur Radio Bands (160-40 meters), it may be a good idea to redesign your 40 meter dipole antenna to accommodate the 80 meter (3. 75 / Freq in Mhz = length in meters of the ideal 5/8th's antenna. ANTENNA PERFORMANCE CHART Type Bandwidth Performance Length Connector Frequency Pricing Helical Short 6% Poor (**) Short All VHF/UHF $$. Helical Antenna Design Calculator. The metric formula is [m], where l is the length in meters. According to IPC-2221 the Minimum Fabrication Allowance is 0. Don’t get me wrong, detail is great in understanding where your money is going, but when it comes to actually doing your taxes. The design frequency, the feedpoint impedance, will be between 80 and 150 ohms. a coffee can). In-store pickup & free 2-day shipping on thousands of items. The Flomerics report referenced in [1] finds that the formula in IPC-2221 correlates to a 4×6 inch board with a 6 inch trace running across the middle of the. You can look at the English unit side of the tape after you've determined the metric length. Jim W6LG 15,529 views. Find the distance around a regular pentagon with one side having a length of 6 meters 10. Often in industry, antennas are screened (pass/fail criteria) based on VSWR specifications (VSWR specs). G0KSC - Free Antenna Designs for Ham Radio. Geometry of the dipole antenna on the EBG substrate. The entire antenna is ½ wavelength long at the desired operating frequency. The approximate formulas used to calculate the inductance are provided along with restrictions on the relative size of the various parameters. L (length in feet) x W (width in feet) = sqft (total square feet). a1 = 51mm, a2 = 35mm, a3 = 3mm, D = 43mm, W = 7mm,. The millimeter is a unit of length which corresponds to one thousandth of a meter. The whip antenna is a stiff but flexible wire mounted, usually vertically, with one end adjacent to a ground plane. It is available Here for free download. That length can be divided by 3 for a delta loop or 4 for a quad style loop. Question 45575: Towering Antenna. Calculate the cost of power to run an appliance. This calculator uses a "K" multiplying factor value of. The calculators also calculates the radio horizon. You have been asked to develop a program to assist in the design of the new dipole antennas. Electrically the J-Pole is a half wavelength antenna that is end-fed by a quarter wavelength stub to achieve a feed point impedance of 50 Ohms. You would have 50 cycles over 340 metres. In reading about antenna loading coils, the authors usually say that the loading coil in the design reduces the necessary length of the antenna by "X" feet at "Y" MHz. The drag force is a function of the fluid velocity and density along with the object's reference area and drag coefficient. An additional function of the APA is to provide antenna position angles and residuals, antenna control mode/status information, and predict-correction parameters to the Area Routing Assembly (ARA) via the LAN, which then sends this information to JPL via the Ground Communications Facility (GCF) for antenna status monitoring. 7 3/10/2002 Path length Answer 114. Later, the scheme was generalized for any number of transmitter and receiver antennas [12–14,17]. Published in association with. Enter the desired frequency and select the wavelength. Antenna Dish Designs 2D & 3D: In this, I am going to explain how to draw an Antenna dish 2D model in AutoCAD software. The Electro-Metrics EM-6869 Active Loop Antenna is used with any receiver or spectrum analyzer with 50 ohm input and covers the frequency range of 9 kHz to 50 MHz. The Coax is kind of cheep. The same formula shows that radar range and accuracy depend on the antenna gain or aperture, which, in turn, depend on the physical size of the antenna. Clear the form to make new entries. Lenn(in) = length of Tiger Tail in inches f = frequency in MHz. Surface Area and Volume of a Pyramid. Then click Calculate. However, ultimate responsibility for the proper use of your equipment lies with you. Use the 4 inch hose clamps to attach a mounting bracket to the antenna. Skin Effect Calculator (1/7) > >> k4kyv: Here is a handy skin effect calculator, where you enter the frequency in kHz, mHz or gHz, and it spews out skin depth in inches or one of several metric units. A very simple and easy to use calculator for calculating the sides on an octagon. The following is a design tool which calculates the inductance of an air core inductor. Aspect ratios >=25. The idea was to evaluate each length on my spectrum analyser. Surface Area and Volume of a Pyramid. Hydro Power Calculator. 4Ghz Waveguide Cantenna Antenna. They follow a constant theme which is designed to make them simple and intuitive to use. there is no point in its length where Fy=0) the shape of which is less affected by inherent stiffness. Simplified Office Software - Voltage Drop Calculator. This app does nothing more than the standard 468/freq (MHz) type calculations. The Russians have always had a special love for 41 meter AM broadcasting. The simple calculator below uses the well-known standard formula for determining the total wire length in feet for a single element (single turn), full wave loop antenna, (length = 1005/MHz). By way of background, a 5/8 wave antenna is the highest directivity, single element, linear antenna that you can construct. This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. A better quality coax would get better inprovement. This length was not the result of calculation, it was rather available as reserve which I bent together with the radiating wire. The EM-6905 can easily be used with any 50-ohm receiving instrument improving sensitivity over a passive device. American & Metric measurements & wire sizes. Lee Spring is your go-to supplier for stock and custom springs, wireforms, fourslide parts and stampings.