Multilayer dual-mode dual-passband balun filter with independently controllable bandwidth and operating frequency

Abstract

The invention provides a multilayer two-mode two-passband balun filter having independent and controllable bandwidth and work frequency. The multilayer two-mode two-passband balun filter comprises a first microwave medium substrate and a second microwave medium substrate, wherein a face of the first microwave medium substrate faces towards the second microwave medium substrate and is provided with a first metal layer taken as a common ground, the first metal layer is provided with two first slits which are orthogonal and have different lengths, a face of the microwave medium substrate is far away from the second microwave medium substrate and is provided with a first paster resonator, the first paster resonator is provided with two second slits which are orthogonal and have different lengths, the first paster resonator is provided with an input end, a face of the second microwave medium substrate is far away from the first microwave medium substrate and is provided with a second paster resonator, the second paster resonator is provided with two third slits which are orthogonal and have different lengths, and two ends of the second paster resonator are orthogonal to the input end and are provided with two output ends. The multilayer two-mode two-passband balun filter is advantaged in that that the multilayer two-mode two-passband balun filter has two two-mode passbands; passband bandwidth and resonant frequency are independent and controllable.

Description

technical field [0001] The invention relates to the field of filters, in particular to a multilayer dual-mode dual-passband balun filter with independently controllable bandwidth and operating frequency. Background technique [0002] With the rapid development of wireless communication systems, multi-band, multi-standard, and multi-mode wireless signals widely exist in the space environment. In order to reduce the cost of communication systems, it has become an industry standard to seek a universal system compatible with multiple communication frequency bands and standards. consensus. Therefore, microwave dual-passband or multi-passband filters have received much attention in the industry. One resonant unit of the dual-mode resonator can function as two resonators, so that the size of the circuit can be greatly reduced while ensuring that the performance of the circuit is not affected. At present, a variety of design methods have verified a variety of dual-mode resonators,...

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Problems solved by technology

[0004] In order to solve the defect that the resonant frequency and bandwidth of the multilayer dual-mode dual-passband balun filter with independently controllable bandwidth and operating frequency in the prior art cannot be independently controllable, a bandwidth with independently controllable resonant frequency and bandwidth is provided Multi-layer dual-mode dual-pass band balun filter independently controllable with operating frequency

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