wireless

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wireless

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Antennas : Feed Lines
  • Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
    [ Hits: 1165 | Votes: 0 | Rating: 0.00 ]
  • SWR: Maximum allowable VSWR - VSWR (voltage-standing-wave-ratio) represents the degree with which an antenna is "matched" to the system impedance. Most modern antennas do not require any tuning for optimum performance. VSWR is one of the easiest parameters to measure and VSWR meters are becoming very popular antenna installation tools
    [ Hits: 1118 | Votes: 3 | Rating: 3.33 ]
Antennas : Helical Antennas : Homebrewing Techniques
  • Yagi Element Mounting Considerations - One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
    [ Hits: 4073 | Votes: 1 | Rating: 10.00 ]
Antennas : Theory
  • Antenna Selection Made Easy - This page will help you answer important questions about antenna selection before you talk to a supplier. After reading this paper, you should be able to better determine the most important parameters you need to know for your antenna selection criteria.
    [ Hits: 1883 | Votes: 2 | Rating: 3.00 ]
  • Antenna Polarization notes - Antenna polarization is a very important consideration when choosing and installing an antenna. Most communications systems use either vertical, horizontal or circular polarization. Knowing the difference between polarizations and how to maximize their benefit is very important to the antenna user.
    [ Hits: 2243 | Votes: 4 | Rating: 3.50 ]
Antennas : WiFi FRS and GMRS : Resources
  • Popular Wireless Magazines - Since 1995, one of best places to go for information about GMRS and FRS. Offer a bulletin board community on the topic
    [ Hits: 906 | Votes: 1 | Rating: 10.00 ]
Ham Radio : Clubs : North America : USA : Texas
  • Richardson wireless klub - The richardson wireless klub is an arrl special service club of amateur radio operators based in richardson, tx, usa.
    [ Hits: 323 | Votes: 1 | Rating: 9.00 ]
Internet and Radio : Directories
  • RF Cafe - Amateur Radio Links - RF Cafe is a unique portal of RF, microwave, wireless, and other engineering resources. Vast collection of equations, references and conversions for electrical, mechanical, physical, and mathematical fields.
    [ Hits: 983 | Votes: 0 | Rating: 0.00 ]
Manufacturers : Antennas : Marine
  • Star Antenna - Communication Electronic designs, manufactures and markets antennas for fixed wireless and mobile wireless applications in a wide range of frequency bands.
    [ Hits: 290 | Votes: 4 | Rating: 10.00 ]
Manufacturers : Digital and Packet Radio
  • 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.
    [ Hits: 723 | Votes: 2 | Rating: 9.00 ]
Manufacturers : Microwave
  • CAP Wireless Amplifiers - Design and manufacture application specific microwave and RF amplifiers, upconverters, downconverters and multifunction assemblies.
    [ Hits: 635 | Votes: 4 | Rating: 7.00 ]
Manufacturers : Towers and Accessories
  • Telecom Product Profiles - Telecom Product Profiles is a manufacturers' rep firm specializing in factory direct Nello Towers, monopoles, antenna mounts, shelters, and more. Factory direct Cellular, PCS, and Wireless Broadband equipment such as antennas, radios, and more. Installation, financing, and leasing options available.
    [ Hits: 847 | Votes: 1 | Rating: 10.00 ]
Operating Modes : Morse code
  • How to build a simple wireless telegraph set - The simplest wireless telegraph set consists of a means of generating and controlling a spark which sends out radio waves into the air, and a receiver or detector to detect the radio waves.
    [ Hits: 4554 | Votes: 27 | Rating: 3.97 ]
Software : Software Defined Radio Technical Reference : Coax Cables and Connectors
  • RF Coaxial Connectors - RF coax(ial) connectors are a vital link in the radio spectrum. Coax connectors are often used to interface two units such as the antenna to a transmission line, a receiver or a transmitter. The proper choice of a coax connector will facilitate this interface.
    [ Hits: 4108 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Lightning Protection
  • About Lightning Protection - What You Should Know About Lightning Protection by Joseph H. Reisert
    [ Hits: 2904 | Votes: 1 | Rating: 8.00 ]
Technical Reference : Radio Frequency Interference : BPL
  • 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
    [ Hits: 251 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Software Defined Radio
  • SDR - Software Defined Radio - Forum - SDR Forum - organization dedicated to promoting the development, deployment and use of software defined radio technologies for advanced wireless systems.
    [ Hits: 1876 | Votes: 0 | Rating: 0.00 ]
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