An active receiving antenna based on a printed monopole and a bipolar transistor is presented in this paper. A transistor is used in order to miniaturize the size and increase the bandwidth of the active receiving antenna in VHF band. The influence of the transistor location on the behavior of a active antenna is investigated. The simulated and measured results are in good agreement.
An active receiving antenna with small size consisting of a monopole loaded with a transistor bipolar is presented in this paper. A transistor is used in order to miniaturize the receiving active antenna size in VHF band. The vertical size of the structure is equal toλ/175, whereλis the wavelength at the lower frequency of the bandwidth. Despite the very small size of the antenna, the frequency bandwidth is very wide and the gain is suitable for FM application with sensitive receivers.
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