Microstrip circulator

Abstract

The present invention provides a microstrip circulator. The sufficient grounding of the circulator and an external circuit can be ensured, and therefore, the normal use of the microstrip circulator can be ensured. The microstrip circulator comprises a cylinder having a cover, and a bottom plate. Voidance grooves are formed at the ring surface of the cylinder having the cover. The bottom of the cylinder having the cover is fixedly mounted to the bottom plate. An in-cavity element is arranged in a cavity formed by combining the cylinder having the cover and the bottom plate. The microstrip circulator is characterized in that the bottom plate is made of a metal and plastic mixed material; the bottom plate is provided with metal connecting portions which are corresponding to the fixed mounting portions of the cylinder having the cover; a center metal connecting region is arranged at the center of the bottom plate; each metal connecting portion is connected with the center metal connecting region through metal wires / metal strips embedded in plastic; and at least one of the plurality of metal connecting portions and the center metal connecting region is connected with the external circuit through soldering.

Description

technical field [0001] The invention relates to the technical field of wireless communication equipment, in particular to a microstrip circulator. Background technique [0002] In the existing wireless communication system, the transmitter is an important part, which is composed of a power amplifier (PA), a coupler, a circulator / isolator, a connector, a duplexer and an antenna, among which the coupler is used For the related monitoring function of the link, the circulator or isolator (the circulator and the power absorbing load are combined to form an isolator) are used to protect the power amplifier tube, and the connector transmits the output signal to the duplexer. It is a similar design in the wireless field, but with the development of wireless communication, the requirements for miniaturization are getting higher and higher. [0003] In the prior art, the microstrip circulator includes a cylinder with a cover and a bottom plate, and the cylinder with a cover is covere...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the microstrip circulator includes a cylinder with a cover and a bottom plate, and the cylinder with a cover is covered on the bottom plate, and an inner cavity of the cylinder with a cover is arranged, and the component in the cavity It includes a circuit part, the three pins of the circuit part protrude outward, and respectively pass through the corresponding avoidance hole grooves on the outer ring surface of the covered cylinder and protrude from the outer ring surface of the covered cylinder. In addition, now Some cylinders with a cover must have a fixed bottom plate that must be a metal structure, and the bottom plate is fixed on the end surface of the circuit board. This structure is designed to ensure that the bottom plate can fully contact the external circuit and ensure the grounding performance of the entire structure. However, due to Defects in the manufacturing process of the bottom plate, the flatness of the bottom plate is affected, and there may be a gap between the bottom plate and the external circuit, which in turn affects the use of the entire microstrip circulator

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