cavity helical

G7LRR Low Band Antennas - G7LRR Amateur Radio Site,160m Helical Antenna

The 160M Homebrew Vertical - The 160M "No Excuses" Homebrew Vertical is a 27 ft. vertical antenna, made from three 10 ft. PVC sections bolted together, and half wavelength of antenna wire helically wound around the PVC sections by K6MM

Helical loop antenna for 20 meters - A Helical Loop Antenna for the 20-meters Band

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

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

Online helix antenna calculator - PHP Helical antenna calculator, need SVG viewer

900 MHz Helical Antenna - Photos and description of a homebrewed 900 Mhz antenna

2.4Ghz Helix antenna  ^pop - Concise instructions on making a broadband helical antenna for 2.4GHz use, such as: 802.11b wireless networking 2.4GHz video links.

Axial-Mode Helical Antennas - Turn Helical Antennas Over Perfect Ground and Modeling Helices in NEC-2

Multi-pitch Helical Antenna - Creating multiple, overlapping resonance at 700-800 MHz band and leaving the VHF part of the response as in ordinary, narrow band helical antenna.

Coaxial-feed axiam mode helical antenna - Coaxial-feed axial mode hemispherical antenna is studied experimentally and theoretically

Axial-Mode Helical Antennas - Notes on Axial-Mode Helical Antennas in Amateur Service. Helix Basics, Modeling Issues, and Short Helical Antennas Over Perfect Ground

Home made GPS antennas - A Home made Helical antenna for a GPS

Helical antenna - Wikipedia

Helical Feed Antennas - Helical antennas have long been popular in applications from VHF to microwaves requiring circular polarization, since they have the unique property of naturally providing circularly polarized radiation. Paul Wade W1GHZ

Helical/helix antenna 2.4 GHz HOWTO - Helical/helix antenna cookbook recipe for 2.4 GHz wavelans and/or WiFi applications

A two dollar helical hf portable antenna  ^pop - Here’s an easily transportable vertical antenna for 20 meters collapsible to 4 feet that costs about $2.00 to make. This was created as a fun project to demonstrate how to enjoy operating HF in the field with a home-made portable antenna without spending a ton of money. Bev AH6NF (YL) made this antenna, tuned and ready to operate in less than one hour

Helical Antenna for 2.4 GHz and 802.11b - The following page details construction of a Helical antenna based on the superb design by Jason Hecker.

Building Helical Antennas - Seattle Wireless - Photos and comments on building an helical antenna for wifi

The Helical Windom Antenna - A marriage of the windom and slinky antennasm, article by NC4TC

Topband Homebrew Helical - Sharing information on Topband Homebrew Antennas, Base & Mobile

TX RX Systems Inc - TX RX Systems Inc. manufactures signal boosters, rf antennas, transmitter combiners, cell enhancers, land mobile radios, duplexers, receiver multicouplers, bidirectional amplifiers, bda, rf amplifiers, rf filters, rf cavity filters, rf combiners, rf components, in building rf coverage, repeaters, repeater amplifiers, rf management equipment, rf systems, and rf solutions. TX RX Delivers Reliable Solutions.

Q-PAR Microwave Antennas - The company (founded in 1973) excels in the research, design, development and manufacture of microwave antenna systems & components. Our range includes horn, reflector, sinuous, spiral, LPDA, helical antennas, etc; antenna positioners, and many bespoke components.

Long Range Wi-Fi - Long range Wi-Fi antennas you can build. Helicals, parabolics, and biquads discussed. How to add external antennas to WUSB54GC and F5D7050 usb wireless adapters for long range connections.

Helical - A graphics-intensive bandpass filter program based on the helical resonator.