Capacitive loaded frequency conversion planar directional dual frequency antenna

Abstract

The invention provides a capacitor-loaded variable-frequency planar directional dual-frequency antenna having advantages of easy processing, miniaturization, high directivity, and good gain. The antenna is composed of a dielectric plate, a DSPL dipole, a chip capacitor, a PIN diode, a feed connector, rectangular metal radiators, and slit structures formed in the middle of the rectangular metal radiators. The rectangular metal radiators are arranged at the upper surface and the lower surface of the dielectric plate symmetrically; the chip capacitor and the PIN diode are connected in series and are welded in the slit structure of the rectangular metal radiator on the upper surface; a central feed pin of the feed connector is connected with the upper surface of a microstrip line of the DSPL dipole; and outer conductor of the feed connector is connected with the lower surface of the microstrip line of the DSPL dipole. According to the invention, a reflection paster is arranged on the upper surface, so that the antenna has the certain directivity; conduction of the PIN diode switch is controlled based on external direct currents, so that the loading states of the capacitor on the antenna is controlled to achieve an objective of frequency conversion.

Description

technical field [0001] The present invention relates to the radio field, and more specifically, relates to a capacitance-loaded frequency-changing planar directional dual-frequency antenna. Background technique [0002] With the rapid development of wireless communication technology, mobile terminals are constantly developing. Due to the different operating frequencies of various communication standards, the antennas of mobile terminals often need to support multiple operating frequency bands at the same time. The coverage bandwidth of traditional broadband antennas can no longer meet the requirements. , so multi-frequency antennas with adjustable functions are more beneficial in practical applications. Contents of the invention [0003] Aiming at the defects of complex structure and inflexible application in the prior art, the present invention provides a capacitive-loaded frequency conversion planar directivity dual-frequency antenna that is easy to process, miniaturized...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortcomings of the prior art, such as complex structure and inflexible application, the present invention provides a capacitive-loaded frequency-changing planar directivity dual-frequency antenna that is easy to process, miniaturized, and has good planar directivity and gain.

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