A Microstrip Array Antenna Structure That Can Improve the Isolation Between Antennas

A technology of microstrip array and antenna structure, which is applied in the direction of antenna array, separately powered antenna array, antenna grounding switch structure connection, etc., can solve problems such as electromagnetic interference, achieve flat isolation performance, enhance decoupling effect, and reduce design difficulty Effect
CN109449608BActive Publication Date: 2020-11-17SHANGHAI SPACEFLIGHT ELECTRONICS & COMM EQUIP RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI SPACEFLIGHT ELECTRONICS & COMM EQUIP RES INST
Publication Date
2020-11-17

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Abstract

The invention relates to a microstrip array antenna structure capable of improving isolation between antennas. The structure comprises a dielectric board; the front side of the dielectric board is provided with transmitting microstrip array antennas and receiving microstrip array antennas at intervals; the back surface of the dielectric board is a metal floor; first isolated antenna arrays and second isolated antenna arrays are introduced between the transmitting microstrip array antennas and the receiving microstrip array antennas; first metallized through holes are introduced between the transmitting microstrip array antennas and the first isolated antenna arrays; second metallized through holes are introduced between the receiving microstrip array antennas and the second isolated antenna array; and at least one circle of peripheral metallized through holes are formed along the outer sides of the transmitting microstrip array antennas and the receiving microstrip array antennas. Thefirst isolated antenna arrays and the second isolated antenna arrays are introduced between the transmitting microstrip array antennas and the receiving microstrip array antennas, so that the isolation performance is improved by 7.5dB under the condition that the distance between the transmitting and receiving antennas is unchanged, and the isolation between the transmitting and receiving antennasin a working frequency band is smaller than 70dB; and the structure is suitable to transmit and receive electromagnetic waves in a continuous wave radar system.
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Description

technical field

[0001] The invention relates to the technical field of microstrip antennas, in particular to a microstrip array antenna structure capable of improving the isolation between antennas. Background technique

[0002] Compared with commonly used microwave antennas, microstrip antennas have the following outstanding advantages:

[0003] 1. Light weight, relatively small volume, low profile, and can conform to aircraft and other carriers;

[0004] 2. Easy to make and modulate, low production cost, suitable for mass production;

[0005] 3. The performance of easy integration has great advantages in the application of millimeter wave band;

[0006] 4. The electrical performance is diversified. By changing the design of the microstrip element, various polarization modes can be easily obtained, and dual-frequency and multi-frequency can also be realized.

[0007] The unique performance of the microstrip antenna determines its wide application background. At present, ...

Claims

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