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Cubical quad antenna calculator in java script let you calculate elements size and spacing in inch and meters.

The J-Pole Antenna Design Calculator, developed by K4ABT, G.E. "Buck" Rogers Sr., facilitates the rapid determination of J-Pole antenna dimensions for various amateur radio bands. Users input their desired operating frequency to generate specific measurements, enabling construction for HF, 2 meters, 220 MHz, 440 MHz, and higher frequencies. The tool supports designs using materials like aluminum or copper, offering flexibility for homebrew enthusiasts. Operational guidance includes recommendations for integrating a **choke balun** near the feedpoint to mitigate RF on the feedline, thereby improving SWR accuracy. For 2-meter operation, a suggested choke configuration involves four turns of coax with a 5-inch diameter, positioned within 3 to 4 inches of the feedpoint. Additional builder hints detail cost-effective construction methods, such as utilizing 1/2-inch EMT conduit and 1/4-inch soft copper for the 'J' section. The resource also references K4ABT's articles in CQ Magazine, specifically "The Packet Users Notebook," providing further technical context and design principles for antenna builders.

This basic calculator is designed to give the aproximate length (height) of a particular vertical antenna, for the frequency and wavelength chosen.

calculates the dimensions and spacings of the elements needed to build a log periodic antenna, given tao, sigma and the lower and upper cutoff frequencies.

HamCalc is a free collection of calculators for radio amateurs include Antenna ERP calculations, Attenuators, Audio Filter design, Coil Winding, Decibels, Great Circles map and calculator, HF Filters, HF Traps, Metric conversions OP Amps QRA Locator to Latitude/Longitude, Radio Horizon calculator, Resonance Satellite orbit calculator Timer calculations (555 timer)Zener Diode calculations Download zip By G4VWL

Design your own 5/8 wave vertical antenna. A simple jscript calculator at Antenna Elmer.

A JavaScript to calculate the dimensions for a seven element Yagi-Uda Antenna

Design your own antenna trap online

Calculate eh antenna components dimension with this online form

J-pole Design Program V1.1 by WA2ISE Download a VHF twinlead Jpole antenna calculator MSDOS program

An efficient program to calculate dimensions of coax dipoles, or bazooka antennas considering velocity length of different coax cables. Express dimensions in feet/inch and meters/cm. Freeware by VE3SQB

Enter the resonant frequency for the dipole/vee antenna calculation

KA1FSB loop calculator give you a quick overview of the feasibility of "squeezing" a loop into your available yard or apartment space. The easy calculator yields a reasonable approximation of dimensions, to within 5% over the amateur bands, using typical wire gauges ranging from 12-18 AWG.

Calculates resonant frequency of a loop antenna, correcting for distributed capacitance.

How to make a simple but effective Slim Jim antenna. It includes a calculator to work out all the mesurements for the frequency you require.

Online calculator for Bi-Quad antennas

Online calculator for Logarithmic Periodic Dipole Antenna LPDA

Helix antenna calculator, to design and make helix antenna plans

Magnetic loop antenna calculator and loop antenna design program for windows let you calculate dimensions for magnetic loops antennas, in german

Kioan's calculator for building a Cantenna , directional waveguide antenna for long-range Wi-Fi

Free windows program to calculate magnetic loop antenna.This small loop antenna calculator allow to determine capacitance and voltage based on Loop circumference, desired resonant frequency, conductor diameter and the operating power

Demonstrates the construction of a 2.4 GHz horn antenna, specifically designed for WiFi applications, with the potential to add several dB of gain. The resource focuses on the critical dimensions and calculations required for proper operation, including _wavelength_ (Lo) and guide wavelength (Lg) based on the operating frequency (Fo) of 2.442 GHz, corresponding to channel 7. The guide provides a table of European WiFi frequencies, ranging from 2.412 GHz to 2.477 GHz, highlighting the specific channel 7 as the design target. It details how the length of the waveguide (Lg) depends on the diameter of the enclosure, offering a practical approach to antenna construction. This project outlines the necessary measurements like Lo/4 at **31 mm** and provides a link to an external calculator for further design specifics. The horn design aims for a 30-degree beamwidth, making it suitable for focused signal transmission or reception.

The page provides detailed instructions on how to build a double bazooka antenna for the 40 meters band. It includes information on materials needed, measurements, and assembly steps. The antenna can be configured as an extended dipole or an inverted V, offering low noise, wide bandwidth, and a 1:1 standing wave ratio. The content also offers calculations for other bands and includes photos of the antenna fabrication process.

A free online calculator for making all of the calculations required to design and build small transmitting loop antennas, also known as magnetic loops by 66pacific.com

Amateur quarter wave ground plane antenna calculator, calculate vertical and radial length

Calculate your dipole, 3 element yagi and a simple dipole

Input the desired resonant frequency and it will calculate lenght in inches feet and meters

This is my simple implementation of the ARRL Antenna Book design equations for the axial-mode helical antenna.

Online calculator for Cantenna special antenna for 802.11 Wi-Fi bands

Java script antenna calculators for ground planes, half wave verticals, quad antenna, 5/8th wave vertical antenna, dipole and inverted vee antennas

Calculate dimension for discone antennas online

The function of the calculator is to give all of the needed sizing to construct a good 5 element quad antenna for amateur radio use.

Online javascript antenna calculator designed to give the critical information of a particular beam antenna, in this case a seven element Yagi, for the frequency chosen.

Calculate dimension for HB9CV directional antennas

Calculates precise dimensions for **Moxon rectangle** HF antennas, enabling hams to design antennas by inputting desired resonant frequency and wire diameter. This web-based tool, version 0.5, is a PHP front-end developed by W4/VP9KF, based on a public domain BASIC program originally authored by L. B. Cebik, W4RNL. It generates critical measurements for the driven element and reflector, ensuring proper spacing and element lengths for optimal performance. User feedback confirms the calculator's accuracy, with one user reporting resonance within 50 Hz of the design frequency for an 18 MHz antenna, eliminating the need for SWR adjustments. This contrasts with other online tools that resulted in significant frequency discrepancies. The tool's precision facilitates building **directional antennas** for specific bands, contributing to effective DXing and contesting operations.

It consists of a group of JavaScript driven web pages that are intended for use as a quick reference for Ham Radio operators or just anyone interested in electronics. Offer calculators for Resistors, capacitors, inductors, power supplies, filters, attenuators and antennas

Easy Quad calculator, enter center frequency to get a quad antenna size

A circular waveguide calculator for designing cantennas include source code and windows executable by lincomatic

ERP Calculator is an Amateur Radio software utility designed to perform a side-by-side comparison of two Ham Radio antenna systems. ERP Calculator comes pre-programmed with data files including published data for several popular brands and types of coax cable as well as several popular antenna system brands and models. ERP Calculator displays values of ERP, Antenna Power Gain, Antenna Feed point Power, Antenna System Gain in dB, Antenna Gain in dBd, SWR Attenuation in dB, SWR Power Attenuation, Coax Loss in dB, and Coax Power Loss

Various radio related software, including some antenna analysis, and impedance calculators.

This is a simple calculator for solving the antenna wire catenary between to end points given the design wind speed, mass per unit length of the wire, wire diameter and Gross Breaking Strength of the wire.

Simple implementation of the ARRL Antenna Book design equations for the axial-mode helical antenna.

Ham Radio 20 / 40 meter short Coax Trap dipole antenna designed with the coax trap design calculator program

Online calculator and construction instructions

Online Yagi Uda antenna calculator

Yagi Calculator is a free Windows program that also runs well on Linux, Ubuntu 8.10 under Wine, to produce dimensions for a DL6WU style long Yagi antenna. Long yagis are commonly used from the 144MHz amateur band to the 2.4GHz band.

Helical antennas invented by John Kraus give a circular polarized wave. They are one of the easiest to design. Find a tube with a circumference equal to one wavelength, and wrap wire in a helix spaced a quarter wavelengt

A simple online folded dipole antenna calculator

A magnetic loop antenna calculator made with an excel sheet that run also with open office, let you design mag loop antenna dimensions by AA5TB

Excel spreadsheet that help calculating dimensions of a high efficiency magnetic loop antenna for HF bands. Giving in input the loop perimeter, loop diameter and loop conductor will calculate electric characteristics, bandwidth, and efficiency