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    Method of making cross antenna

     

    Many users are making a lot of firing circuit boards, also used a lot of the antenna, but enthusiasts are always looking for high-efficiency transmitting antenna, the following description of this cross is a television or radio antenna used in transmitting antennas hope enthusiasts solve the problem!

         Cross antennas usually consisting of two equivalent oscillators rotating field antenna horizontally polarized. Because the direction of the antenna characteristics of a good, producing simple, low-power TV transmitters are often used as omnidirectional antennas. Also, because of this low-gain antenna, so much less for 100 watt VHF television station

    please Click hereto get our dipole antenna

     

     

     

    please Click hereto get our dipole antenna

     

     

    The main structure of this antenna is relatively simple, two equivalent to the level of cross oscillator can be fixed, the wiring is a little more than a single equivalent dipole complex, image expression is not clear, broken down as follows:

    Note: The picture shows the schematic diagram drawn not to scale the length of the cable, two U-shaped loop of cable length is half the wavelength, painted short, two quarter-wavelength long line of paint.

       Year, such antennas used more, production is also large, equivalent to the oscillator is a special custom-made ​​specification aluminum tubes. Today, few people use the VHF band for low power television transmitter's omni-directional horizontally polarized emission, of course, the company also no longer have this material. Consequently, the oscillator was turned into a cross-section production of materials for the 10 × 3mm of aluminum, for 1-5 channels strong enough antenna, antenna for channels 6-12 is more than sufficient. The figure is the one for 2000 households in the village provided the big double cross-shaped rotating field antenna, 3W RF power from the drive.
     
     please Click hereto get our dipole antenna

     

      这种天线的馈电比单层的更复杂一些,分解图如下:

     

     

     

     

     

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