An array antenna fed by an inverted microstrip slot waveguide

Abstract

The invention relates to an array antenna fed by an inverted microstrip slot waveguide, which is mainly consisted of a first feeder network layer, a radiating layer comprising a second feed network and a slit coupling layer disposed between the first feeder network layer and the radiating layer, the first feeder network layer is arranged in an inverted microstrip slot waveguide, the inverted microstrip slot waveguide consists of two parallel plates, the upper parallel plate is an ideal metal plate, and the lower parallel plate is an ideal magnetic conductive plate, which is equivalent to a lower metal plate and a metal cylinder periodically arranged on the metal plate. The surfaces of a plurality of metal cylinders are provided with a dielectric plate, the surface of the dielectric plate is provided with a metal conductive band, and the ideal metal plate is arranged above the dielectric plate. The dielectric plate and the metal conductive tape constitute the first feed network layer, and the ideal metal plate constitutes the gap coupling layer. By using the array antenna technology, the feed loss can be reduced, the antenna gain can be increased, and the antenna bandwidth can be increased.

Description

technical field [0001] The invention relates to the technical field of millimeter wave antennas, in particular to an array antenna fed by an inverted microstrip slot waveguide. Background technique [0002] In recent years, wireless communication and radar technology have developed rapidly, and many new technologies have emerged and been rapidly applied. At the same time, spectrum resources have become more and more crowded. High-frequency resources must be developed to meet the needs of various applications. Therefore, millimeter wave and terahertz frequency bands It has been developed rapidly. As the key components of various communication systems, antennas are facing new challenges and technical difficulties, which mainly reflect the following aspects: 1. The problem of efficiency. In the millimeter wave frequency band, various losses such as conductor loss and dielectric loss Losses are much greater at low frequencies, resulting in less efficient antennas. 2. The proble...

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Problems solved by technology

[0002] In recent years, wireless communication and radar technology have developed rapidly, and many new technologies have emerged and been rapidly applied. At the same time, spectrum resources have become more and more crowded. High-frequency resources must be developed to meet the needs of various applications. Therefore, millimeter wave and terahertz frequency bands It has been developed rapidly. As the key components of various communication systems, antennas are facing new challenges and technical difficulties, which mainly reflect the following aspects: 1. The problem of efficiency. In the millimeter wave frequency band, various losses such as conductor loss and dielectric loss Losses are much greater than at low frequencies, resulting in less efficient antennas

2. The problem of size. Nowadays, many application fields, whether it is radar or communication, put forward low-profile requirements for antennas. They all hope that the size of the antenna is small and the height is low. The original high-efficiency reflector antenna cannot meet the requirements.

3. The problem of bandwidth. In the millimeter wave frequency band, various applications are broadband systems, which require the antenna to have a relatively high relative bandwidth. However, the narrow bandwidth of the traditional waveguide slot antenna is difficult to meet the requirements. 4. The problem of cost, each application Manufacturers hope that the antenna processing should be simple and the cost should be low under the condition of meeting the index requirements

Aiming at the design difficulties and requirements of the millimeter-wave antenna mentioned above, we propose an array antenna fed by an inverted microstrip slot waveguide, which can overcome the drawbacks of the previous feeding network with large losses, and design a millimeter-wave antenna with high efficiency, low profile, and broadband antenna

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