Coaxial radio frequency connectors are important radio frequency transmission components in the microwave field. Because of their bandwidth, convenient and reliable connection, superior performance, and low cost, they are widely used in microwave communication equipment, instrumentation and weapon systems. In recent years, with the rapid development of modern communication technology, the technical requirements for radio frequency coaxial connectors of the whole equipment are getting higher and higher. Including broadband, low standing wave, miniaturization, multi-function, high reliability, fast connection and so on. Therefore, the need to improve the design of coaxial radio frequency connectors is imminent.
The optimization path of the coaxial radio frequency connector includes: structural optimization, circuit optimization, and impedance optimization.
1. Adopt the most concise design structure while fully satisfying customer needs. Simple is reliable. The simple structure can not only effectively reduce the existence of discontinuities (segments) and improve the electrical performance, but also the simple structure has better mechanical reliability.
2. Try to make the impedance of each segment match the nominal characteristic impedance. Ensuring the uniformity of the transmission line impedance is the key to reducing reflections.
3. Coplanar compensation for inevitable discontinuities one by one. Coplanar compensation is an effective method to weaken and eliminate concentrated reflections (discontinuities). Its principle is to introduce a section of inductive or capacitive area in the vicinity of the discontinuities (capacitive or inductive). The "average impedance" in a certain area near the point is close to the nominal characteristic impedance value to achieve the purpose of reducing reflection in a certain frequency band. Fundamentally speaking, coplanar compensation is to form a low-pass filter network at the mismatched part. As long as the passband is wide enough (covering the frequency range required by the connector), ideal compensation can be obtained to ensure the effectiveness and reliability of its interconnection. sex.
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