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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

Calculate Double bazooka for Win3/Win95 by W4BEJ

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

This is a radio frequency propagation calculator for the transmission path between an RF transmitter and a receiver.

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.

Amateur Contact Log (AC Log) by N3FJP is a commercial Windows-based general logging program designed for amateur radio operators, supporting Windows 7 through 11. It provides comprehensive tracking for various operating awards, including Worked All States (WAS), Worked All Counties, Worked All Countries (WAC), DXCC, VUCC, Grids, Zones, IOTAs, and Lighthouses. The software features a customizable user interface, allowing operators to display specific data fields and adjust font sizes. It includes built-in databases for counties and countries, facilitates queries by band, mode, or power level, and offers a bearing and distance calculator for DX contacts. AC Log also provides DX spotting via Telnet or packet TNC, supports keyboard CW, and can play wave files. The program offers full support for ADIF import and export, enabling seamless integration with external services like eQSL, QRZ, Club Log, and the ARRL's Logbook of the World (LoTW) for QSO uploads and confirmation downloads. It interfaces with popular transceivers from Elecraft, Icom, Kenwood, Ten Tec, and Yaesu, and connects with digital mode software such as WSJT-X, Fldigi, and JTAlert via API. AC Log includes a Net Manager form for group logging, prints basic QSL label strips, and integrates with QRZ and Ham Call lookup services. The software is fully networkable for multi-PC operation, supports Parks on the Air (POTA) logging, and displays worked entities and DX spots on a real-time world map. Full featured Trial version available for 45 days

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

About grid locators and grid squares, includes links to locator and grid square calculators

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

Calculate bearing and distance and Locator online with this Java application, may not work with all browser.

This small window application will calculate Coax Cable loss from SWR and SWR from Cable Loss

Online calculator for a 4 to 1 coax cable balun

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

Choose Iron Powder or Ferrite and calculate required turns

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.

University of Texas Amateur Radio Club RF-Calculator. This is a main beam power density estimation program intended for use as part of a routine evaluation of RF safety compliance with FCC regulations

Excel spreasheet that calculate virtually every transmission line parameter that one may need. Include Length conversions, Reactance and Length of Stubs

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

On-line single-layer coil designer

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.

Calculate the inductance of a single-layer, air-core coil.

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.

BesserNet Reflectometer is a fun SWR calculator and simulator Java applet

Direction and distance calculator for windows

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.

Grid Square and Distance calculator by w3km