wireless spectrum analyz

Build An LF Antenna Analyzer - A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.

Building a 2.4GHz 10 Element Brass Yagi  ^{updated  pop} - Build this home made yagi antenna for your 2.4ghz wireless ethernet.

Biquad Antenna Construction - This page details the construction of a biquad antenna. The biquad antenna is easy to build, and provides a reliable 11dBi gain, with a fairly wide beamwidth.

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.

802.11b Homebrew WiFi Antenna Shootout  ^pop - Guide to homebrew your wifi antenna, using a tin can, in this cases using a pringles can. This antennas are also known as cantenna and let you spread your wifi signal.

USA frequency allocations - The radio spectrum in usa, PDF File representing the united stares frequency allocations in graphical mode, by NTIA

VK1WIA - Wireless Institute of Australia National News Service

W5HLH - The Future of radio - Exploring the future of radio, wireless, broadcasting, ham radio, and DX/shortwave listening. Edited by Harry Helms, W5HLH.

Richardson wireless klub - The richardson wireless klub is an arrl special service club of amateur radio operators based in richardson, tx, usa.

BayCountyScanner.org - Listen to public service communications within Bay County, Michigan, USA.

WeatherShack.com - Weather stations at weathershack.com. your source for weather instruments, weather station, wireless weather stations and home weather stations

MAXRAD Antennas - manufacture networking antennas and accessories for 802.11a, 802.11b and 802.11g WiFi (Wi-Fi) and WiMAX applications, including wireless bridging, wireless LANs, RFID and wireless hots spots

WiNRADiO Communications - WiNRADiO Communications manufacture radio communications equipment for a very wide range of applications. Our customers include professional communications radio users in government, military, security, surveillance, spectrum monitoring organizations, telecommunications, industry, as well as radio and computer enthusiasts.

W&W Batteries manufacturer - U.s.a. manufacturer of replacement radio batteries, battery packs, inserts, chargers, analyzers, and battery eliminators for the public safety, land mobile, amateur radio and cellular phone industry.

AN Wireless Tower Company - AN Wireless is a manufacturer and distributor of Self Supporting Tower Systems for Wireless Communications, Wireless Internet, Wireless Networking, Microwave, Paging, Broadcast, Two-Way Radio and Amateur Radio.

Canada, radio spectrum allocations - Graphical maps of radio spectrum and frequency allocations in canada

Longwave operations - In the VLF portion of the spectrum it is easy to listen to the emissions created by the Earth itself. These emissions are generated by many different mechanisms and are often beautiful to listen to. Coverage on LF and MF frequencies

Batterytech - Buy nimh, ncicad, and li-ion batteries, chargers, and analyzers for laptops, pdas, digital cameras, cellular phones, nextel radios, hand held scanners, and eliminators

RadioLabs - Radio, Wireless and Beyond - Specialize in engineering, design and repair of all rf equipment. Dealer for two way radios, scanners, shortwave radios, wi-fi antennas, wifi amplifiers. Based in Fortuna, California.

Asian broadcasting institute - ABI is a nonprofit organization established in 1979 to research and analyze broadcasting in Japan, South and North Korea, China, Hongkong, Taiwan, Macao and Mongolia in addition to international service around the world in languages used in those countries and regions.

XLZIZL by AC6LA - XLZIZL is an Excel application that analyzes the components of an antenna feed system, including transmission lines, stubs, baluns, and tuners. Calculations include impedance transforms, SWR and reflection coefficient, power loss, voltage and current standing waves, stress on tuner components, network attenuation (S21), and return loss Analysis results are available in worksheet format and in five different chart formats, including Smith charts.

FFT Explorer - A free (GPL) Linux (Xwindows GUI-based) utility that performs spectral analysis on real-time data from a sound card or other source, and can analyze the spectra of various sound file types. It can also accept data from many kinds of applications in plain-text form by way of the "named pipe" feature of Linux

Spectra SDR Software Defined Radio - Power Tools, communications architecture wireless mobile middleware tool

Broadband news : another bpl trial dropped - The company trialing the technology has decided BPL was not "commercially deployable," and has instead decided to focus on wireless mesh networking in the region

Rainbow Antenna Analyzer - A small and inexpensive measurement device designed to determine antenna performance across the amateur bands through use of automatically collected SWR readings