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An antenna or aerial is an electronic component designed to transceive radio signals (and, more generally, other electromagnetic waves). Antennas are for transmission of radio wave energy through the natural media (i.e., air, earth, water, etc.) for point-to-point communication or for the reception of such transmitted radio wave energy. Antennas are primarily designed for transmission of radio wave energy through free space or any space where the movement of energy in any direction is substantially unimpeded, such as interplanetary space (such as the interplanetary medium or interstellar medium), the atmosphere, the ocean (and other large bodies of water), or the Earth. Antennas are used for communicating and conveying information specifically in larger systems, such as the radio, telephone, and the telegraph.

Physically, an antenna is an arrangement of conductors designed to radiate (transmit) an electromagnetic field in response to an applied alternating voltage and the associated alternating electric current, or to be placed into an electromagnetic field so that the field will induce an alternating current in the antenna and a voltage between its terminals.

Terminology


The words "antenna" (plural: antennas In the context of engineering and physics, the plural of antenna is "antennas", and it has been this way since about 1950 (or earlier), when a cornerstone textbook in this field, Antennas, was published by John D. Kraus of the Ohio State University. Besides the title, Dr. Kraus noted this in a footnote on the first page of his book. Insects may have "antennae" but not in technical contexts.) and "aerial" are used interchangeably throughout this article. The origin of the word antenna relative to wireless apparatus is attributed to Guglielmo Marconi. In 1895, while testing early radio apparatus in the Swiss Alps at Salvan, Switzerland in the Mont Blanc region, Marconi experimented with early wireless equipment. A 2.5 meter long pole, along which was carried a wire, was used as a radiating and receiving aerial element. In Italian a tent pole is known as l'antenna centrale, and the pole with a wire alongside it used as an aerial was simply called l'antenna. Until then wireless radiating transmitting and receiving elements were known simply as aerials or terminals. Marconi's use of the word antenna (Italian for pole) would become a popular term for what today is uniformly known as the "antenna". "Salvan: Cradle of Wireless, How Marconi Conducted Early Wireless Experiments in the Swiss Alps", Fred Gardiol & Yves Fournier, Microwave Journal, February 2006, pp. 124-136.

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Pro-cell Co., Ltd. - Manufacturer of a variety of antenna types and frequency ranges. Located in Taiwan, Republic of China.
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PSI - Designer and manufacturer of broadcast FM and television antennas.

Q-par Angus Ltd. - Designs and manufactures microwave antennas, positioners, solutions for industry, waveguide components, filters and turnkey systems.
Meta Description: [ Microwave antennas, horn antennas, antenna positioners, waveguide components, turnkey systems and microwave research & consultancy services to customer requirements by Q-par Angus Ltd. ]

R.A.Miller Industries Inc. - Manufacture multiband antennas for the automotive, aviation and military markets .
Meta Description: [ When you think of antennas, only one name should come to mind: RAMI. We are The Antenna Professionals. ]

Racal Antennas - Develope and manufacture military and base station, in-building and cellular base station antennas and telescopic support masts in GSM900/1800 bands.
Meta Description: [ Racal Antennas develop and manufacture military + base station, in-building, cellular base station antennas and telescopic support masts in GSM900/1800 bands. We also provide HF, vehicle, UMTS, 3G, Multi band, High frequency, Manpack, Shipboard and Bowman specified antennas and Tactical. We des... ]

RADIAL - Russian manufacturer of base station antennas and related equipment.
Meta Description: [ Фирма Радиал - ведущий российский производитель базового антенно-фидерного оборудования ]

Radiall-Larsen Antenna Technologies - Manufacture portable, mobile and base station antenna serving the amateur, two-way, SMR, cellular, PCS, GPS and data markets.
Meta Description: [ The Radiall/Larsen facility, located in Vancouver, Washington, is the Worldwide Antenna Competency Center for the RADIALL group. Radiall/Larsen is responsible for the design, development and production of technologically advanced small antenna products serving a global market. ]

Radio Frequency Systems - Design and manufacture antenna and cable systems for the wireless markets.

Raibeam - Manufacturer of high performance critically coupled beam antennas. Product information and specifications, links.

Rantec MDM, Inc. - Designers and manufacturers of antennas for communication, military, video and data transmission applications.
Meta Description: [ Rantec Microwave Systems, Inc. provides experienced microwave antenna design and manufacturing capabilities for both military and commercial applications such as radar, missile guidance, navigation satellite communications and space. ]

Renair Antennae Ltd - Manufacturers VHF, UHF, GPS, base station antennas, coaxial connectors and cable. Available configurations include yagis,dipoles and colinear arrays with an in house design capability.

RF iNet, Inc. - Supplier of high performance antenna products for wireless handsets, data devices, networks, and mobile terminal antennas to the global market.

RR Electronic - Producer of satellite television antennas for use at sea as well as multifunctional active antennas.
Meta Description: [ RR antenna-systems. The ultimate antennas for all demands ]

RYMSA - Multi-access and cellular base station antennas, broadcasting, space and military antennas. [Site uses Flash plugin][Site may not work in all browsers]
Meta Description: [ Página Web de Radiación y Microondas S.A ]

San Jose Navigation, Inc. - Manufacturer of GPS receivers, antennas, car navigation and AVL products.
Meta Description: [ Our GPS products include: GPS Tracking, GPS receiver, GPS tracker, GPS antenna, GPS Device, GPS Tracking System, GPS/GSM tracker, GPS engine board, AIS (Automatic Indentification System),Marine AIS Receiver and GPS logger, with headquarters in Taiwan. ]

Scout Telecomunicazioni - Manufactures VHF, UHF, CB antennas for marine, mobile, base, remote radio monitoring and control system.
Meta Description: [ Produzione di antenne ricetrasmittenti per telecomunicazioni. Producer of antennas for radiocommunications ]

SE Engineering - Manufactures FM antennas and mast ground kit, 75 ohm isolation transformer and accessories for the broadcast industry.
Meta Description: [ SE Engineering, featuring the new SE 879 FM Stereo Antenna and Mast Ground Kit, 75 ohm Isolation Transformer and Accessories. A site for true audiophiles. ]

SeaTel Inc. - Marine stabilized satellite antennas for DBS and VSAT applications at sea.

Seavey Engineering Associates, Inc. - Develop, test, and manufacture antennas and microwave components for the needs of the commercial microwave industry.
Meta Description: [ Founded in 1981 to develop, test, and manufacture antennas and microwave components for the needs of the commercial microwave industry. ]

Secugis - Manufacturer of RF module, GPS antenna, AVL, satellite navigation.

Securawave - Multibeam waveguide antenna solutions delivering NLOS performance for; Wi-Fi, 802.11, Bluetooth and other ISM devices.
Meta Description: [ Wave Guide Antennas and Wireless Solutions ]

Select-A-Tenna - Manufactures a line of inductive loop AM radio antennas.

Sensor Systems Aircraft Antennas - Designs, manufactures and distributes airborne communication and navigation antennas for commercial and military applications, including GPS and satellite communications.

Sgel Technologies srl - Special antennas for ORBCOMM Satellite systems and projects special devices for telecommunications and power purposes

Shenzhen Asuck Electronics Co., Ltd. - Manufactures nearby frequencies front-end systems, satellite equipment.
Meta Description: [ 奥斯卡邻频前端系统,奥斯卡卫星设备,可变频调制器,固定频调制器,全新宽带数字高频头,ASK Nearby Frequencies Front-end System,ASK Satellite Equipment,Variable Channel Modulator,16 Way Mixer,Digital Satellite Integrated Receiver & Decoder ]

Shreyas Communication and Services - Manufacturer of antennas and accessories for DECT based WLL network. [Site may not work properly in all browsers]
Meta Description: [ Shreyas Communication is a manufacturer of a range of antennas and accessories such as lightning protectors, mounting accessories, pre-connectorised cable assemblies for DECT based WLL network. ]

Shye Chi Industrial Co., Ltd. - Manufacturer and exporter of antennas for mobile phones, hardware, and clock parts.
Meta Description: [ Shye Chi Industrial Co., Ltd. is a professional gold foil/dust producer in Taiwan, specialized in laser engraved, color-printed and made-to-order pieces. Therefore we have spent over four years in the technical development. All kinds of items are made of 99.9 pure gold. Any appealing drawing, att... ]

Siepel - Manufacturing and installation shielded rooms, anechoic chambers.
Meta Description: [ Siepel is one of the leading manufacturers of Shielded Rooms,Microwave absorbers and Anechoic Chambers. | Sphere of activity : EMV (electromagnetic compatibility) & FARADAY Technologie ]

Signal Antenna Systems, Inc. - Custom antenna design and development company based on application needs and specifications.

Simple Solutions - run by Colin Halligan, based in Kendal, Cumbria, supply a range of GSM, GPS 802.11 antenna.
Meta Description: [ text ]

Sinclair Technologies Inc., - Manufacture mobile and fixed antennas, duplexers, multicouplers, transmitter combiners, cavity filters, and specialized communications shelters.
Meta Description: [ Established in 1951, Sinclair Technologies provides antenna and filter products, systems and coverage solutions for public safety and private wireless networks. ]

Sirio Antennas - Manufacturer of base station, mobile, and marine antennas for CB, ham, and cellular. Product specifications. Based in Italy.

Skymasts Antennas - Manufacturer and installer of base station antennas and related equipment.
Meta Description: [ Skymasts Antennas have been a world class manufacturer and installer of high quality base station antennas since their inception in 1989. ]

SmartAnt Telecomm Co., Ltd - Design and manufactures antennas for the wireless industry.

Space Star Antenna - Specializes in RD, production of earth station antenna, antenna controls,SNG antenna and microwave components etc.

Stella Doradus - Manufacturer of sectoral, omnidirectional, for 2400-2483MHz ISM, 2.5-2.7GHz MMDS, 3.4-3.7GHz WLL.
Meta Description: [ Stella Doradus. Antenna manufacturer for sectoral, omnidirectional, receive and transmit antennas. ]

STI-CO Industries Inc. - Manufacture disguised mobile antenna systems. Product catalog, technical centre and FAQs .

Sunwoo Antenna Co,.Ltd - Manufacture antenna, positioner and RF components for a range of applications. Product photographs and technical data .

SuperPass Company, Inc. - Sector panel, horizontal polarization, omni directional, directional panel and vertical polarization sectoral antennas for 2.4, 3.5, 5.8 GHz and wireless 802.11 LAN.
Meta Description: [ SuperPass Company Inc. -- Sector, Omni-directional and directional antenna manufacturer for 2400-2483MHz ISM, 2.5-2.7GHz MMDS, 3.4-3.7MHz WLL, 5.7-5.9MHz UNII, 406-512MHz UHF, wireless networking bands. ]

Swedcom - Manufactures high performance antennas for cellular, PCS and ISM/Broadband.
Meta Description: [ Swedcom Antenna is a global supplier of high-performance base station antennas for cellular, PCS, TDMA/CDMA/GSM/UMTS/EDGE and WiFi/WLAN- the leaders in log-periodic antennas. ]

TCS Inc. - Manufacture antenna controllers, reflectors and pedestals.

Telecom Product Profiles - A manufacturers' representative company specializing in solutions for business or home reception of data, video or voice.
Meta Description: [ Telecom Product Profiles, TP Pro, Specializes in Nello Towers, monopoles, antenna mounts, shelters, Guyed towers, self-supporting towers, bracketed towers, BX towers formerly ROHN Tower Cellular, PCS, and Wireless Broadband equipment such as antennas, radios, and more. Installation, financin... ]

404 Telex Communications - Manufacturer of antennas for military, WLAN, WISP, WCS, MMDS and U-NII from 30 MHz to 6 GHz.
Meta Description: [ Site Home page for Dev Wireless ]

Tennadyne Corporation - Specializing in the design and manufacture of the broadband log periodic dipole array antennas.

TIC Gen Direct - Manufacturer of antenna positioning equipment. Product information and customer gallery.
Meta Description: [ Fireworks Splice HTML ]

TIL-TEK Antennas Inc. - Manufacture base station and remote antennas in frequencies from 800 MHz to 5.8 GHz, with selected products from 300 MHz to 28 Ghz. Applications include cellular, GSM, PCS, DECT, WLL/WLAN and rural point-to-multipoint systems .
Meta Description: [ TIL-TEK Antennas (Founded 1979) - Manufacturer of Telecommunications equipment. TIL-TEK provides reliable and cost-effective antennas that employ leading-edge design and production techniques. An important ingredient of TIL-TEK's success is the ability to custom-tailor antenna designs to meet th... ]

Time Domain Corporation - Developer of ultra-wideband technologies for communications, radar, and navigation and positioning.

Times Antenna - Manufacturer and distributor of a VHF and UHF antenna systems. Based in China.
Meta Description: [ Antenna manufacturer and exporter of 2.4GHz-5.8GHz Antennas,WIFI Antenna. Base in China ]

Titanex - Manufactures antennas for amateur radio, commercial, military and technical-scientific purposes.
Meta Description: [ Titanex - High Tech HF Antennas and Accessories ]

TMC Design Corporation - Engineering firm that designs and manufactures antennas, arrays and related products for both commercial and military applications. Provides product support services.

TriPoint Global, Inc. - Developer of microwave antennas and accessories for the point to point communications industry.

Tritium Ltd. - Manufacturer of compact WLAN accessories and community broadband sharing schemes.
Meta Description: [ WiFi Antenna Low cost antenna parabolic reflector on-line Purchase Tritium Limited. ]

Trival Antene - Development and production of professional antennas, antenna masts and accessories for military, marine, radioamateur, PMR, ISM and other wireless applications.
Meta Description: [ Trival Antene - Professional Antennas and Antenna Masts, Antennas and Antenna Masts for military, marine, amateur, fixed, mobile and portable radio and other wireless communications. Designed and manufactured for MF, HF, VHF, UHF, FM, HAM, ISM and EMC applications to professional telecommunicatio... ]

Twin Antenna Manufacturer - Developes and produces various types of antennas for use in communications, television broadcasting, satellite communication and other fields as well as custom design work.

U B Corp - Designs and manufactures military and commercial microwave antennas for aerospace applications.

Uni Link Technology Co., Ltd. - Manufacturer of DVBT, digital, VHF/UHF, wireless lan, outdoor wireless, and magnetic/on-glass vehicle units.
Meta Description: [ Made By Web Design Template @rt_web Designed With TimeLineDesignUnitLens ]

United States Antenna Products, LLC. - Manufactures and installs HF/VHF/UHF, RLPA, receive loop, and wire array ground based antenna systems. Also rotators, controllers and towers. Worldwide installation and repair services.
Meta Description: [ USAP and USTS will provide a total antenna system, up and running - just connect your radios to the transmission lines we have installed. ]

500 Untenna - Low profile transmitting and receiving antenna with models covering the complete 30 MHZ to 900 MHZ frequency range.
Meta Description: [ The Untenna is a low profile transmitting and receiving antenna with models covering the complete 30 MHz to 900 MHz frequency range. ]

US Communications - Planar invisible antennas for front and rear bumper or license plate.
Meta Description: [ Our NEW DIVERSITY LICENSE PLATE antenna system (front and rear license plates) become the antennas. Available in VHF, UHF, Dual Band and other frequencies. We also manufacture DIVERSITY BUMPER ANTENNAS that will interface with the license plate system in the event there is no front plate or any p... ]

V K Antennas - Designers, manufacturers antennas for VHF, UHF and higher bands.

Visiosat - Manufacturer of DTH and SMATV equipment for satellite reception : fiber and metal dishes and antennas, digital set-top boxes, digital receivers.
Meta Description: [ Manufacturer of satellite antennas, digital receivers, and VSAT equipment for satellite reception. ]

Wallen Antennae - Manufacturers and designers of radio antenna systems and GSM arials.
Meta Description: [ Wallen Antennae, we design and manufacture quality antenna systems to meet high performance requirements. For all your antenna needs, contact Wallen Antennae ]

Wanlito - TV antennas and other like regulators,doorbells,digital satellites,receivers,energy-saving lamps and power transformers.

WaveFrontier - Wide range of original multi-beam antenna systems, working in the microwave and multimeter wave band.

Waveguide Solutions - TWS manufacture an unrivalled range of precision microwave waveguide systems and components for the military radar, medical and aerospace industries.
Meta Description: [ The Waveguide Solution is the leading force in the design and manufacture of precision microwave waveguide and components for commercial,medical and military applications ]

Williamson Antennas - Designer and manufacturer of specialized uplink equipment as well as nursery and greenhouse machinery.
Meta Description: [ Designer and manufacturer of specialized uplink equipment. We also design and manufacture Nursery and Greenhouse equipment. We specialize in 1.2m uplink mounts, motorized for Vsat, 2 Way Internet, and SNG usage. Also a line of Nursery equipment, including auger buckets for spreading of mulch, 44 ]

WiMo Antennen und Elektronik GmbH - Provides all kinds of antennas and accessories (standard lines and custom design), RF connectors, radio transceivers and accessories like power supplies, morse keys, lowpass filters.
Meta Description: [ Antennas and Amateur Radio. Antennen und Amateurfunk: all kinds of antennas (standard/custom design), RF connectors, transceivers and accessories: power supplies, morse keys, lowpass filters etc. ]

Winchester Electronics - The Electronic Components and Materials Group designs and manufactures antennas and RF connectors. Division of Northrop Grumman.

Wlan antenna group - 2.4 ghz antennas, ism band antennas, and wireless internet antennas.
Meta Description: [ 2.4 ghz antennas,802.11B antennas,wireless network antennas for SMC,Linksys,D-Link,Cisco,Breezecom,IBM,Intel,lucent,Orinoco,Proxim,Wi-lan,Waveaccess and others at 2.4 ghz. ]

Wondermast - Supplies information about RPU (Marti) remote broadcast antenna.
Meta Description: [ Type site information ]

XA Associates - Antennas, voice compression, echo cancellers, multiplexers, channel banks, optical transmission, digital cross connect and T1 E1 converters
Meta Description: [ 700 MHz Antenna Provider XA Associates provides antenna of all variety but specializes in 700 MHz Antenna Solutions and Telecom Solutions. ]

Xertex Technologies, Inc. - Design and manufacture antennas for wireless communications, including in-building, PCS, cellular, wireless local loop, wireless LAN .

Yaxin Electronics Science and Technology Co.,Ltd. - CDMA(800MHz), GSM900, GSM1800 base station antenna used in the field of mobile communications.

Yi Chang Hsiang Industrial Co. - Manufacturing and developing cellular phone antenna.

Ying Hao Metal Industrial - Antennas for portable/mobile telephone and data systems.
Meta Description: [ Manufacturer of antennas for portable/ mobile telephone bluetooth system, cellular phone, rod antenna& rubber antenna, etc. ]

ZCG Scalar - Designs and manufactures broadcast, base station, mobile, telephone, marine, portable and data link antennas. Also provides custom and field services and related accessories.
Meta Description: [ ZCG Scalar design and manufacture a huge range of World Class Antennas and Accessories for numerous radio frequency applications. Product categories include Base Station, AM/FM Radio and TV Broadcast, Mobile, Cellular Mobile Phone, Marine, Data Link and Portable. All our products are manufacture... ]

Zhongshan Masda Antenna Co Ltd. - Manufacturer and exporter of antennas and amplifiers.
Meta Description: [ manufacturer and exporter of antenna includes antenna set, remote control antenna, indoor active antenna, indoor amplifier, wired amplifier, main line amplifier, branch alloter. ]

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