Double-frequency duplexer based on substrate integrated waveguide
A substrate-integrated waveguide and duplexer technology, which is applied to waveguide-type devices, electrical components, circuits, etc., can solve the problems of bulky metal waveguides, difficult integration, and failure of microstrip lines, and achieves simple design structure and increased size Gain, easy industrial processing effect
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[0031] Example 1
[0032] Such as Figure 4 As shown, a wave port is on the middle metal layer of the SIW cavity, that is, a microstrip line is on the middle metal layer of two dielectric plates, and two equal gaps are set on both sides of the microstrip line, passing through the microstrip line. The coplanar waveguide is converted to form a wave port, and metal through holes are arranged along the two sides of the equal gap, and the same metal through holes are arranged on the other three sides, wherein the distance between the two through holes is equal. T-shaped output ports are set in the center of the upper and lower surfaces of the dual-frequency SIW duplexer to realize the power division of the signal. Such as Image 6 The S-parameter simulation waveform diagram shown has dual frequency points at 11.6 GHz and 13.5 GHz, and the return loss is greater than 20 dB and 22 dB, respectively, and its working performance is good.
Example Embodiment
[0033] Example 2
[0034] Such as image 3 with 5 As shown, the duplexer is composed of upper and lower double cavities. The middle metal layer serves as the isolation layer of the upper and lower layers. Each cavity consists of metal through holes around the dielectric substrate and upper and lower metal layers. The same layer of cavities is coupled The window realizes signal transmission. Such as Image 6 It is the S-parameter simulation waveform diagram of a compact dual-frequency duplexer with a double-layer substrate integrated waveguide. Its dual frequency points are 11.6GHz and 13.5GHz, the return loss is greater than 20dB and 22dB, and the insertion loss is less than -1dB. Good performance.
[0035] The invention aims to provide a dual-frequency duplexer based on a substrate integrated waveguide, which solves the problem of low passband gain of the SIW filter and lays a foundation for future research on filters with higher passband gain.
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