Broadband capacitively-loaded tunable antenna

摘要

A broadband capacitively-loaded tunable antenna, and device there for is provided. The device comprises: an antenna feed; a first radiating arm connected to the antenna feed; a second radiating arm capacitively coupled to the first radiating arm; an adjustable reactance device connecting the second radiating arm to one or more of a ground and a third radiating arm; and, a processor in communication with the adjustable reactance device, the processor configured to adjust a reactance of the adjustable reactance device to tune a resonance frequency of a combination of the second radiating arm, the adjustable reactance device, and, when present, the third radiating arm.

主权项

1. A device comprising:
an antenna feed; a frequency filtering circuit; a first radiating arm coupled to the antenna feed using the frequency filtering circuit; a second radiating arm capacitively coupled to the first radiating arm; an adjustable reactance device connecting the second radiating arm to a third radiating arm; a bias voltage device in communication with the adjustable reactance device; a fourth radiating arm coupled to the antenna feed using the frequency filtering circuit, the fourth radiating arm configured to resonate at a frequency different from the first radiating arm and a combination of the second radiating arm, the adjustable reactance device and the third radiating arm, the frequency filtering circuit coupling each of the first radiating arm and a fourth radiating arm to the antenna feed, the frequency filtering circuit configured to electrically isolate the first radiating arm from the fourth radiating arm at each respective operating resonance frequency range; and, a processor in communication with the bias voltage device and the adjustable reactance device, the processor configured to adjust a reactance of the adjustable reactance device to tune a resonance frequency of the combination of the second radiating arm, the adjustable reactance device, and the third radiating arm by adjusting the bias voltage device to a given voltage, the given voltage in turn applied to the adjustable reactance device by the bias voltage device.