High-Order Mode Resonant Slot Antenna Based on Hexagonal Substrate Integrated Waveguide

Abstract

The invention discloses a high-order-mode resonant slot antenna on the basis of a hexagonal substrate integrated waveguide, which can implement in-phase feeding on two bent radiation slots. The antenna comprises a dielectric substrate, an upper surface metal layer and a lower surface metal layer; a T-shaped co-ground coplanar waveguide input end is etched on the upper surface metal layer; a first bent radiation slot and a second bent radiation slot are etched on the lower surface metal layer; the T-shaped co-ground coplanar waveguide input end crosses the first bent radiation slot; a distance from the bent position of the T-shaped co-ground coplanar waveguide input end to a datum line is two thirds of a distance from the cavity center of a hexagonal substrate integrated waveguide cavity to the datum line; TM110 mode field distribution in the hexagonal substrate integrated waveguide cavity near a center working frequency can be excited, so that in-phase feeding on the two bent radiation slots is implemented; moreover, application of two opposite and symmetrical bent radiation slots reduces the transverse size of the antenna. The high-order-mode resonant slot antenna is suitable to be popularized and applied in the technical field of the antenna.

Description

technical field [0001] The invention relates to the technical field of microwave and millimeter wave antennas, in particular to a high-order mode resonant slot antenna based on a hexagonal substrate integrated waveguide. Background technique [0002] The traditional metal waveguide cavity slot antenna has the advantages of narrow main lobe width, high radiation efficiency, high gain and fixed beam pointing, etc., and is widely used in microwave and millimeter wave radar and communication systems. A complete metal waveguide cavity slot antenna system is composed of multiple metal waveguides. Slits are etched on the wall of some of the waveguides whose terminals are short-circuited to form a radiation unit, and the other part of the waveguides is used as a feed network. However, the traditional metal waveguide cavity slot antenna also has problems such as difficult design, large volume, heavy weight, high cost, and difficulty in processing and planar integration. [0003] The...

AI Technical Summary

Problems solved by technology

However, the resonance modes excited by the existing integrated waveguide slot antennas based on hexagonal substrates are generally low, resulting in fewer radiation slots. Generally, there is only one slot, and it is impossible to feed multiple radiation slots in the same phase, and it is difficult to excite high-order modes. And it is easily affected by interference modes, so it is difficult to obtain high gain and ideal pattern

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