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Adjustable electromagnetic shielding cover and radio frequency circuit optimization method

An electromagnetic shielding cover and optimization method technology, applied in the field of radar, can solve the problems of insignificant adjustment effect of cavity effect and high cost, and achieve the effect of reducing debugging workload, making up for performance differences, and the method is simple and efficient

Inactive Publication Date: 2016-09-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to add additional devices and control circuits, and the cost is high
And the adjustment effect on the cavity effect is not obvious

Method used

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  • Adjustable electromagnetic shielding cover and radio frequency circuit optimization method
  • Adjustable electromagnetic shielding cover and radio frequency circuit optimization method
  • Adjustable electromagnetic shielding cover and radio frequency circuit optimization method

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Embodiment Construction

[0034] The present invention provides an adjustable electromagnetic shielding cover and a radio frequency circuit optimization method. In order to make the objectives, technical solutions and effects of the present invention clearer and clearer, the present invention will be further described in detail with reference to the drawings and examples. It should be understood that the specific implementation described here is only used to explain the present invention, but not to limit the present invention.

[0035] Such as Figure 1 to Figure 3 As shown, the adjustable electromagnetic shielding cover provided by the present invention includes a metal shielding cover, an internal circuit structure and a tuning screw 1. A tuning screw 1 is provided at the sensitive part of the cavity effect of the metal shielding cover. The head of the tuning screw 1 protrudes from the upper surface of the shielding cover. A threaded through hole is provided on the shielding cover. The screw hole is T...

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Abstract

The invention discloses an adjustable electromagnetic shielding cover and a radio frequency circuit optimization method. The electromagnetic shielding cover comprises a metal shielding cover and a circuit structure arranged therein, and tuning screws are arranged at sensitive positions of a cavity effect in the metal shielding cover. According to the method, through establishing a cavity model, an influence exerted by a shielding cover cavity on a microwave and radio frequency circuit is analyzed; the specially optimized tuning screws are additionally arranged on the shielding cover of the microwave and radio frequency circuit, slits between the tuning screws and the circuit are adjusted, and an equivalent circuit of a cavity between the circuit and the shielding cover is changed; and the adjustable electromagnetic shielding cover can obviously inhibit cavity resonance, adjusts the cavity effect and improves performance of the circuit.

Description

Technical field [0001] The invention belongs to the field of radar, and is an adjustable electromagnetic shielding cover used for optimizing microwave and radio frequency circuit indexes and a method for optimizing the radio frequency circuit. Background technique [0002] Any electronic device must meet EMC (electromagnetic compatibility) standards. The metal electromagnetic shielding cover of the circuit is usually used to shield electromagnetic radiation and provide a pure working environment for the circuit. Usually, R&D personnel will separate each part of the circuit with a metal shield along the grounding wire. The electromagnetic shield usually does not cause any influence on the low-frequency circuit, but when the circuit works at high frequency, the size of the cavity is larger than 1 / 4 of the wavelength of the working frequency of the circuit, the cavity will have an impact on the circuit. In an ideal lossless resonant cavity, the resonance frequency can be calculate...

Claims

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Application Information

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IPC IPC(8): H05K9/00H01P7/00
CPCH05K9/0056H01P7/00
Inventor 彭珍妮
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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