Dielectric image-resonator multiplexer
First Claim
1. A multiplexer comprising two, three or four channels, each channel having one bandpass filter, each filter having at least one cavity, said at least one cavity of each filter being a common cavity with all of the other filters of the multiplexer, said common cavity containing one independent dielectric cut image resonator for each filter representing a channel of said multiplexer, each resonator being mounted on a suitable support, said common cavity providing a common junction and containing a means to couple electromagnetic energy between the various channels, said multiplexer having at least one input and at least one output.
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Abstract
A two, three or four channel multiplexer can be operated in the TE01δ or HE11δ modes, each channel of the multiplexer has one bandpass filter, with each filter usually having a plurality of cavities. One cavity of each filter is a common cavity with all of the other filters of the multiplexer. The common cavity contains one independent dielectric quarter-cut or half-cut image resonator for each filter representing a channel of the multiplexer. Each resonator is mounted on a suitable support the common cavity provides a common junction and contains a loop coupling to couple electromagnetic energy between the various channels. The multiplexer has at least one input and at least one output. Previous microwave multiplexers have a plurality of bandpass filters arranged on a coaxial manifold. With the multiplexer of the present invention, the manifold can be eliminated. Further, at the S-band or L-band, substantial weight and volume savings can be achieved using the multiplexer of the present invention without sacrificing performance. This can be very important for space applications.
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Citations
26 Claims
- 1. A multiplexer comprising two, three or four channels, each channel having one bandpass filter, each filter having at least one cavity, said at least one cavity of each filter being a common cavity with all of the other filters of the multiplexer, said common cavity containing one independent dielectric cut image resonator for each filter representing a channel of said multiplexer, each resonator being mounted on a suitable support, said common cavity providing a common junction and containing a means to couple electromagnetic energy between the various channels, said multiplexer having at least one input and at least one output.
Specification