FIELD: physics, radio.
SUBSTANCE: invention can be used in space-saving dipole antennas for radio communication and navigation. Broadband tuned image antenna contains capacitive radiating element in the form of rectangular plate, tuner with chain of series inductance coils each of which is bridged with proper key, and working bandswitch. One chain lead is connected to lower edge of capacitive radiating element, and another one with earth surface through antenna mount. Keys are vacuum high-frequency relays with control core shielded with earth surface. Internal conductor of coaxial cable through series chain of the first capacitor and additional inductance coil is connected to capacitive radiating element, and besides through the first switch contact of switch and the second capacitor is connected to earth surface of antenna, and through the second switch contact of switch with capacitive radiating element. Volume streamlined antenna cover is metal. Additionally antenna is equipped with discharge current stub connected to antenna mount.
EFFECT: elimination of atmospheric electricity effect on antenna tuning elements, yet maintaining radiation efficiency in lower working frequency range.
2 dwg
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