Miniaturized broadband power divider circuit based on spur lines

Abstract

The invention discloses a miniaturized broadband power divider circuit based on spur lines. The circuit includes a first port (1), a second port (2), a third port (3) and an isolation resistor (R1), wherein the isolation resistor (R1) is arranged between the second port (2) and the third port (3), a transmission path from the first port (1) to the second port (2) adopts a microstrip line, a transmission path from a first port (1) to a third port (3) adopts a microstrip line, a first spur line (20) is arranged on the microstrip line of the transmission path from the first port (1) to the second port (2), a second spur line (30) is arranged on the microstrip line of the transmission path from the first port (1) to the third port (3), and the first spur line (20) and the second spur line (30) are used for reducing the size of the power divider, reducing insertion loss and expanding the bandwidth of the power divider. The relative electrical length of the microstrip lines increase based on the spur lines, the actual length is shortened, the size of the power divider is reduced, and stepped impedance lines and branch lines are equivalently introduced to the transmission paths to expand the bandwidth of the power divider, and the power divider is smaller in size than a traditional Wilkinson power divider, and has larger bandwidth and smaller insertion loss.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave wireless communication, and in particular relates to a miniaturized broadband power divider circuit based on spur wires. Background technique [0002] The power splitter is an important passive device in the microwave radio frequency circuit. With the rapid development of communication technology and the intensification of competition in the communication industry, new requirements are put forward for the performance of the power splitter. The traditional Wilkinson power splitter not only has good amplitude and phase characteristics, but also has good port matching, low transmission loss and easy design, and is widely used in power splitter design. However, the bandwidth of a single Wilkinson power divider does not exceed 20%. The narrow bandwidth limits it to work only in a single frequency band and its odd harmonics, which cannot meet the broadband requirements of modern wi...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of increasing bandwidth but sacrificing size and increasing insertion loss in the prior art, the present invention provides a miniaturized wideband power divider circuit based on spur lines, by adding spur lines on the basis of Wilkinson power dividers, Make the circuit meet the requirements of size reduction, insertion loss reduction, and bandwidth expansion

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