Differential Power Divider with Filtering Characteristics

Abstract

The invention discloses a differential power allocator having filtering characteristic, and mainly solves the problems of poor common-mode suppression degree and selectivity. The differential power allocator comprises a microstrip dielectric substrate (1) and a metal grounding plate (4), wherein a U-shaped input microstrip feeder (2), a U-shaped output microstrip feeder (3) and two L-shaped stepped impedance microstrip lines (5 and 10) are printed on the microstrip dielectric substrate, two stepped impedance slot line structures (7 and 12), a T-shaped uniform impedance slot line structure (8),two L-shaped step impedance slot line structures (9 and 11) and two uniform impedance slot lines (13 and 14) are etched on the metal grounding plate (4), a central position of a first uniform impedance slot line (13) bridges a first isolation resistor R1, and a second isolation resistor R2 is bridged at a central position of a second uniform impedance slot line (14). The differential power allocator is good in selectivity and high in common-mode suppression degree and isolation degree and can be used for mobile communication.

Description

technical field [0001] The invention belongs to the technical field of microwave and radio frequency, in particular to a differential power divider, which can be applied to the radio frequency front end of a wireless communication system. Background technique [0002] Filters and power dividers are two indispensable key devices in modern mobile communication systems, which can respectively realize signal selection and signal power distribution / combination. In recent years, with the rapid development of mobile communication technology, the miniaturization and cost reduction requirements of communication systems are getting higher and higher. The continued use of some traditional single-function devices will inevitably lead to larger systems and higher costs. Based on this trend, some dual-function devices, such as power dividers with filtering properties, have been extensively studied. On the other hand, since the differential system has a good suppression effect on environm...

AI Technical Summary

Problems solved by technology

[0003] In 2013, scholars such as Lin-Sheng Wu published an article Balanced-to-Balanced Gysel PowerDivider With Bandpass Filtering Response in IEEE TRANSACTIONS ONMICROWAVE THEORY AND TECHNIQUES, the top journal in the microwave field, but the selectivity of this filter power divider is poor

In this paper, a new structure is used to improve the common mode rejection of the differential filter power divider, but the insertion loss is relatively large

Images