Broadband power combiner with filtering characteristic

Abstract

The invention belongs to the technical field of radio frequency microwaves, and particularly relates to a broadband power combiner with a filtering characteristic. The broadband power combiner comprises a first microstrip line, one end of the first microstrip line is connected with a first port, the other end of the first microstrip line is connected with starting ends of two side-by-side power dividing modules, a tail end of any power dividing module is connected with a second microstrip line through a filtering module, and any second microstrip line is connected with a second port. When thefirst port is used as an input end, the two second ports are output ends. The filtering module comprises a short-circuit coupling line and a transmission line, the transmission line comprises a firstend connected with the power dividing module and a second end connected with the second microstrip line, and the short-circuit coupling line comprises two microstrip structures which start from two ends of the transmission line and oppositely extend to a cross area. According to the invention, the condition of cascade connection of the power combiner and the filter in a microwave circuit system can be replaced, the use of a filter connected with the rear end of the power combiner is removed, the insertion loss of the circuit is reduced, the size of the circuit is decreased, and the cost is saved.

Description

technical field [0001] The application belongs to the field of radio frequency microwave technology, in particular to a broadband power combiner with filtering characteristics. Background technique [0002] Filters and power dividers are important components in radio frequency and microwave communication systems. Filters are a two-port network with frequency selective characteristics, that is, signals can be transmitted without attenuation in the passband, and signals in the stopband Can't transmit at all. The power divider is a multi-port passive microwave device, and its function is to distribute the input signal power to each output port in a certain proportion. The power divider can also be used in reverse as a power combiner, through which the microwave signals of various channels can be superimposed to obtain the required output power. [0003] Most of the existing microstrip power combiners adopt the Wilkinson form, such as figure 1 As shown, in the case of equal d...

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Problems solved by technology

[0004] In the power distribution / combination network, in order to improve the selective suppression of harmonics in the system, an additional filter is required to eliminate noise, interference and harmonics caused by nonlinear devices, but this will increase the overall size of the system , and it will also increase the loss of the circuit, which is also unfavorable to the cost of the circuit design

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