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Small size antenna for broad-band ultra high frequency
Small size antenna for broad-band ultra high frequency
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机译:小型天线,用于宽带超高频
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摘要
A small size broad-band ultra high frequency antenna including a dielectric substance in the sleeve of an antenna body whereby approximating resonance frequency of the sleeve portion to resonance frequency of the body of the antenna so that a double-tuning circuit is formed thereby causing the impedance characteristics of the antenna to have double-peak characteristics within the working frequency band. The antenna further includes an impedance matching transformer for matching the impedance of the antenna to the characteristic impedance of a feeder line connected to the antenna, the matching transformer being composed of a coaxial type impedance transducer which has an opposite reactance component sufficient to offset the reactance component of the antenna and has the characteristic impedance convertible to the feeder line impedance.
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