Planar patch antenna for substrate integration waveguide slotting coupled feeding

Abstract

The invention relates to a planar patch antenna for substrate integration waveguide slotting coupled feeding. The planar patch antenna for the substrate integration waveguide slotting coupled feeding comprises a lower layer substrate integration waveguide structure and an upper layer patch antenna. The lower layer substrate integration waveguide structure comprises a lower layer substrate, two metal plates which are arranged on the front face of the substrate and the back face of the substrate respectively, two rows of metalized through holes which are formed between the substrates and a gap which is formed in the metal plate on the front face of the lower substrate. The upper layer patch antenna comprises an upper substrate and a radiation metal patch. The upper layer patch antenna is laminated on the lower layer substrate integration waveguide structure, and electromagnetic coupled feeding is conducted through the adoption of the slotting gap on the metal plate on the front face of the lower layer substrate integration waveguide structure. The planar patch antenna for the substrate integration waveguide slotting coupled feeding is simple in structure, easy to machine, capable of being easily integrated with a circuit, low in loss, and capable of being widely applied to microwave millimeter wave antennas.

Description

technical field [0001] The invention relates to a planar patch antenna technology, in particular to a patch antenna with integrated waveguide slot coupling and feeding. Background technique [0002] In recent years, due to the development of radio technology, more and more attention and research have been paid to planar patch antennas. In addition, due to the advantages of small size, light weight, and simple structure, planar patch antennas are now the research field of antennas. one of the key points. [0003] The feeding method of the traditional microstrip antenna is also relatively flexible. The main feeding methods are: (1) Coaxial feeding, which is a back feeding method. The advantage is that the feeding line will not affect the radiation characteristics of the patch. The main disadvantage is It is difficult to integrate with microwave circuits; (2) Direct feeding of microstrip lines has the advantage of simple structure and easy integration with circuits. The disadv...

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Problems solved by technology

[0003] The feeding method of the traditional microstrip antenna is also relatively flexible. The main feeding methods are: (1) Coaxial feeding, which is a back feeding method. The advantage is that the feeding line will not affect the radiation characteristics of the patch. The main disadvantage is It is difficult to integrate with microwave circuits; (2) Direct feeding of microstrip lines has the advantage of simple structure and easy integration with circuits. The disadvantage is that microstrip feeders will also generate radiation, which will affect the patch radiation and generate radiation Loss, in the microwave and millimeter wave frequency band, this loss will be greater, (3) slot-coupled microstrip feeding structure, this method belongs to indirect feeding, it is electromagnetically conducted through the coupling slot on the microstrip feeder and the common ground plate Coupled feeding, the advantage is that the feeding structure will not affect the patch radiation characteristics, the disadvantage is that in the microwave and millimeter wave frequency bands, the coaxial feeding is a three-dimensional structure that is not convenient for integration, and the loss of the microstrip feeder is relatively large.

[0004] The above feeding method has the disadvantages of being difficult to integrate with the microwave planar circuit or having a large loss. In view of the above problems, the present invention proposes a structure based on integrated waveguide slotting coupling feeding, and the substrate integrated waveguide structure has small loss. , easy to integrate with planar circuits

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