A Planar Horn Antenna with Filtering Function

Abstract

The invention belongs to the technical field of antennas, and discloses a planar horn antenna and a filter antenna with a filtering function, including: a filtering structure, a radiation structure, a feeding structure, a dielectric substrate, and a metal floor. The invention uses a grounded coplanar waveguide to feed the horn antenna, the upper and lower surfaces of the dielectric substrate are metal floors, the filtering structure is a metallized through-hole array embedded in the horn, and the final signal is radiated through the aperture of the horn antenna on the right. The antenna of the present invention adopts a planar single-layer structure to print the horn antenna on the PCB, and by adding a filtering structure inside the horn antenna, the filtering function is simultaneously realized without increasing the volume of the device, and the structure is simple and compact and easy to integrate; it works in 16.3-17.1GHz, with good in-band selection and out-of-band suppression characteristics in the frequency band; overcomes the shortcomings of traditional filter antenna design with large size, integrates filter and antenna design, further reduces volume and low manufacturing cost, The filter structure design is simple.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a planar horn antenna and a filter antenna with a filtering function. Background technique [0002] At present, the closest existing technology: in wireless communication systems, antennas and filters are essential, but in traditional wireless communication system design, antennas and filters are designed separately, and then directly cascaded, the antenna and filter Impedance connection ports must match the characteristic impedance of 50Ω in most cases. And the addition of the impedance matching network will increase the device size and insertion loss of the radio frequency front end. In order to solve the above problem, a new design concept is proposed, that is, filter antenna. This design method is to integrate the filter and antenna into one device, so that it has the functions of filter filtering clutter and antenna radiation signal at the same time. In the d...

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Problems solved by technology

[0003] To sum up, the problem existing in the prior art is that most of the existing devices related to filter horn antennas in the prior art are obtained by adding a filter structure to the metal pyramid horn, which is more complicated than the structure of the substrate-type filter horn antenna. Relatively complex, relatively large and cumbersome, relatively cumbersome design, does not meet the trend of terminal miniaturization

[0005] Significance of solving the above-mentioned technical problems: In order to realize the miniaturization of the equipment size, the present invention designs and uses the substrate integrated waveguide technology, because the profile of the dielectric substrate is too low, the matching of the horn antenna is poor, and adding a filter structure inside the horn antenna will make the The internal field distribution of the horn changes, which affects the radiation performance of the antenna

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