network analyzers

A Lowband Antenna that is Almost Free  ^pop - The Shunt-fed Tower, an effective Low Band Antenna, uses your beam as a capacitive top-hat and only needs a simple feed network and a good ground system to work DX on 80M and 160M.

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.

Pfeiffer Quads - The Pfeiffer Quad was described in QST and has the desirable feature that it is smaller than a standard cubic quad but does not compromise performance very much. The Pfeiffer design is rather difficult to construct because of the complicated linear loading networks required.

Cubical Quad Antenna Calculator - 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.

How to build a tin can waveguide antenna  ^pop - Looking for an inexpensive way to increase the range of your wireless network? A tin can waveguide antenna, or Cantenna, may be just the ticket. This design can be built for under $5 U.S. and reuses a food, juice, or other tin can.

Dish 802.11 Wireless Networking Antenna - This antenna modification is for the IEEE 802.11b networking protocol that operates at 2.4 GHz. It can be scaled easily to the 5 GHz frequency used by IEEE 802.11a by simply scaling the dimensions on the feed can and the excitation antenna to 2.4/5 = 48% of the dimensions shown above.

NCDXF/IARU Beacon Project - The NCDXF, in cooperation with the IARU, constructed and operates a worldwide network of high-frequency radio beacons on 14.100, 18.110, 21.150, 24.930, and 28.200 megaHertz. These beacons help both amateur and commercial high-frequency radio users assess the current condition of the ionosphere

EA3BHK Xavier - Personal amateur radio page abaout dx, dxcc, iota, clusters network.

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

RACOM - Radio modems - RACOM is a Czech company specialized in design and production of radio modems and other devices for wireless data networks for radio channels from 140 to 900 MHz. RACOM radio data networks are suitable for data transfer in telemetry & SCADA applications, transaction networks, security systems, IP networks and firts of all mobile tracking and fleet management.

GAO Engineering - Gao engineering offers a wide range of affordable, popular and reliable rfid products, dsp, arm and other microprocessor evm and development boards, ides, universal programmers, emulators, dsp learning systems, micro-network terminals, test and measurement products for engineers.

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.

Amateur Television Network (ATN) - Fast Scan Amateur Television in Southern California, Nevada, Arizona, New Mexico, Indiana and soon in Illinois.

WA4DSY 56KB RF Modem - This is a prototype of the WA4DSY 56KB RF modem. It is intended for use on amateur packet radio networks. The modem generates RF in the 28 to 30 mhz range and requires and linear transverter to convert the signal to a UHF or microwave ham band

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

Smith Chart Software - SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size. Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.

SmartSmith - A smarter version of the Smith Chart program. It allows you to dynamically generate impedance point plots as you configure each design element of an impedance matching network. Has an extensive Help file with a Wizard that tells you what steps to take in designing a matching network for a given load impedance. Complete Windows installation kit by w9dmk

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.

IP-Sound  ^pop - IP-Sound is a Free application for audio exchange client to client over a TCP/IPv4 network (Lan/Internet). The main purpose for the existence of IP-Sound is to provide low quality audio 8-16kHz, with low latency for use together with remote control software for "ham" radio amateur equipment. IP-Sound is developed by SM5VXC.

EchoMac - Mac Ham Radio EchoLink Client - EchoMac is an apple macintosh client for EchoLink internet radio network.

AA5TB Antenna Coupler / SWR Bridge - Wire antennas requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (5000 ohms)

Opera - Opera is the Open PLC European Research Alliance for new generation PLC integrated network

Bbc new: home network on electricity wires

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