Products/Services for Logperiodic HF Antenna

  • Antennas-Image
    Antennas - (1099 companies)
    ...include: Yagi-Uda antennas, which have an active element with accompanying parasitic and reflective elements to create a highly-directed transmission. Log-periodic antennas, which are multi-element, unidirectional, narrow-beam antennas that have impedance...
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    Antenna Mounts - (27 companies)
    Antenna mounts are used to hold and support antennas of all sizes and shapes. The antenna collects the electromagnetic signal and sends it to the receiver. There are many types of antennas and mounts including for radio, television, global...
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  • Chip Antennas-Image
    Chip Antennas - (65 companies)
    Chip antennas are semiconductor ICs used to collect or radiate electromagnetic waves. Chip antennas are a particular type of antenna valued for their small footprint. They are most commonly integrated in circuit boards to radiate high frequency...
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    Antenna Design Software - (11 companies)
    Antenna design software is used for the design and electromagnetic analysis of all types of antenna systems, including planar and microstrip antennas, hollow waveguide and horn antennas, and helical antennas. Antenna design software is used...
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  • Horn Antennas-Image
    Horn Antennas - (43 companies)
    Horn antennas are used for the transmission and reception of microwave signals. They are usually fed by waveguides. Horn antennas, colloquially referred to as gain horn antennas, are used for the transmission and reception of microwave signals...
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    Radomes - (26 companies)
    Radomes are weatherproof enclosures to protect an antenna from the elements. Radomes are more typically used on satellite or microwave antennas, but can be used with any antenna. Radomes are structures or enclosures designed to protect an antenna...
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    Wireless Systems - (285 companies)
    Wireless systems consist of combined RF components such as transmitters, receivers, transceivers, filters, down / up converters, antennas and antenna positioners. Wireless systems consist of combined RF components such as transmitters, receivers...
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    Towers, Masts, and Poles - (308 companies)
    Towers, masts and poles elevate, support and/or position personnel and equipment such as antennas, lighting, surveillance cameras or sensors, wind turbines, weather instruments, and power lines. Towers, masts, and poles are used to provide elevation...
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    SWR Meters - (9 companies)
    ...of the match between the antenna and the receiving system. VSWR is the ratio of the maximum voltage to the minimum voltage on an electrical transmission line. In other words, it is a measure of the impedance mismatch between a transmission line and load...
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    RF Amplifiers - (556 companies)
    RF amplifiers are devices that accept a varying input signal and produce an output signal that varies in the same way, but with larger amplitude.
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  • Two-element assembly of measuring antennas for a 1-12.75 GHz frequency range
    In this. case, it has appeared. that the low fre- quency and high kequency logperiodic antennas (LPA- LF and the LPA- HF ) should consist of 14dipoles.
  • A low cost extension of spectrum analysers to dosimeters
    A picture of the Hyperlog 7040 antenna and the Spectran HF -4040 can be found in figure 1. .... The characteristics of a logperiodic antenna are a broad frequency range, moderate size, directivity, low cost, and…
  • THz Josephson spectral analysis
    The admittance of vered from the dc I-V and dV/dI various applied magnetic fields Logperiodic geometry of the separation of vibrators in in logarithmic periodicity of a antenna admittance. .... of radiation, art in the form of an odd- d the voltage V = hf /2e. u3O7-x .
  • A description of the hardware element of the NASA EME flight tests
    HF source. .... This system was a trailer mounted equipmentcontainerthat held a 1kW transmitterand a log periodic antenna . .... The logperiodic had a gain of 7.5 dBi and couldbe positionedin either verticalor horizontalpolarization.
  • Wire grid modeling with interactive graphics
    Figure 1 shows a model o f an E6-A a i r c r a f tw i t h HF antenna . .... and logperiodic antennas.
  • Electromagnetic Compatibility in Railways
    Other radio sources may be found in the HF band (between a few MHz and a ten … an amplitude modulated signal fed from a RF signal generator to an amplifier and then an antenna . .... For the normally used antennas (biconical and logperiodic antennas) the electromagnetic field is applied in both polarizations…
  • Log periodic dipole arrays
    …of “all-wave” rotatable beams of very low cross section for usein the hf to uhf spectrum. .... I4 I. INTRODCCTION OG periodic antenna design has been the subject of several papers over the past .... ~ - ~ Logperiodic antenna designs are available, for example, which pro- videomnidirectional,bidirectional,orunidirectional radiation patterns and…
  • Introduction to Electromagnetic Compatibility 2nd Edition Complete Document
    In the measurement of radiated emissions for compliance verification, the biconical antenna is typically used in the frequency range of 30 – 200 MHz, whereas the logperiodic antenna is typically used in the remainder of the band from 200 MHz to 1 … cones (assumed free space), J ¼ 0, ~ ~ ^ ^~ ^ ¼ Hf af and E…
  • Antenna Parametrization for the Detection of Partial Discharges
    The energy in detail 5, mostly corresponding to DAB radio, and the approximation, HF band, is also .... Therefore, the zigzag antenna is working in bands where the environmental noise is important and which hide .... The logperiodic antenna is a good reference to compare the results, although its response is not so…
  • A review of Chinese designed surveillance radars-past, present and future
    %& logperiodic elementa.vertical polarization Diredive gain 26dBfat 14.!5M&) Azimuth beamwidth 6" (at 14.6MHz) Scanning .... Another branch of HF OTH-B radar, the Gr- ound Wave Radar. has also been researched and … lzl- Vertically polarized ground waves transmit- ted by an on-shore broad beam antenna of the HF…