Balanced band-pass filter based on right-angle triangular paste structure and design method thereof

Abstract

The invention provides a balanced band-pass filter based on a right-angle triangular paste structure and a design method thereof. The balanced band-pass filter comprises a micro-strip sheet unit, a base plate and a metal ground layer which are arranged from top to bottom in sequence; the micro-strip sheet unit comprises a right-angle triangular micro-strip unit and a half-wavelength resonator; theright-angle triangular micro-strip unit comprises right-angle triangular pastes A1 and A2 which are coupled and cascaded mutually, and also comprises micro-strip feeder lines B1, B2, B3 and B4 whichare embedded into the right-angle sides of each right-angle triangular paste, and the four micro-strip feeder lines are correspondingly connected with a first one-quarter wavelength open-circuit stubline C1, a second one-quarter wavelength open-circuit stub line C2, a third one-quarter wavelength open-circuit stub line C3 and a fourth one-quarter wavelength open-circuit stub line C4; the first right-angle triangular paste A1 and the second right-angle triangular paste A2 are cascaded, and the half-wavelength resonator is loaded between the first right-angle triangular paste A1 and the secondright-angle triangular paste A2.

Description

technical field [0001] The present invention relates to the field of wireless communication, more specifically, to a balanced bandpass filter based on a right-angled triangle patch structure and a design method thereof. Background technique [0002] With the rapid development of wireless communication technology and the gradual improvement of people's requirements for communication quality, more and more scholars and researchers have focused their attention on the research of wireless communication devices. As a frequency-selective passive device, microwave filters can suppress various noises and useless signals and retain effective signals. They play an important role in wireless communication systems, and their performance will directly affect the quality of communication systems. good or bad. However, in a noisy environment, common filters are susceptible to interference, making it difficult to meet basic communication system requirements. In order to better suppress no...

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Problems solved by technology

But they are all based on the linear structure of microstrip. When the operating frequency increases, the circuit size will become small, which requires high processing accuracy, high cost, and its performance is not as good as low frequency.

However, the traditional metal waveguide device is expensive and difficult to maintain due to its large size, complicated processing technology and debugging process.

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