A New LTCC Stacked Circularly Polarized Microstrip Antenna

Abstract

The invention provides a novel LTCC stacked circularly polarized microstrip antenna, which overcomes the defects of existing microstrip patch antennas that it is difficult to take into account the performances of high gain, wide frequency band, circular polarization and miniaturization. The new microstrip antenna is based on LTCC technology, which increases the number of coupling patches, optimizes the traditional mode of one excitation patch corresponding to one coupling patch, and effectively improves the gain of the microstrip antenna. The gain of the antenna unit is higher than that of the traditional antenna unit. It has increased by more than 50%, and the radiation efficiency at the center frequency is above 90%. It has high gain and high radiation efficiency in a wide frequency band, and the antenna has better circular polarization characteristics, which can better take into account the microstrip patch Antenna performance requirements of high gain, broadband and circular polarization. When a certain gain is required, the use of the antenna unit array effectively reduces the area of ​​the antenna array compared with the traditional antenna unit, and realizes the miniaturization design of the high-gain antenna.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to an LTCC laminated high-gain broadband circularly polarized microstrip antenna. Background technique [0002] Microstrip patch antennas have the advantages of small size, light weight, thin profile and easy to conform to the carrier. In recent years, they have been widely used in radar, missile measurement and control, weapon fuze, electronic countermeasures, mobile communication, remote sensing and telemetry and other fields. In airborne or missile-borne applications, the performance requirements of microstrip patch antennas are particularly emphasized for their high gain, wide frequency band and circular polarization. However, the gain of the existing microstrip antenna unit is generally about 4-6dBi. To obtain greater gain, it is necessary to form a larger antenna array, but this method is at the cost of increasing the area of ​​​​the antenna, which is not conducive to microst...

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Problems solved by technology

However, the gain of the existing microstrip antenna unit is generally about 4-6dBi. To obtain greater gain, it is necessary to form a larger antenna array, but this method is at the cost of increasing the area of ​​​​the antenna, which is not conducive to microstrip stickers. The conformal design of the chip antenna and the carrier and the development requirements of miniaturization make the antenna structure complex or unable to achieve circular polarization. In addition, the existence of the air layer also reduces the mechanical strength of the antenna itself, which is often not possible for circularly polarized array antennas. Considering both circular polarization and gain characteristics

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