bridge

Abstract

The invention discloses an electric bridge, which includes a non-inverting power divider and a broadband balun. The in-phase power divider is a pair of microstrip lines of equal length, and each end of the two microstrip lines is connected to form a common end for transmitting signals. The broadband balun is a pair of parallel coupled lines, one of which includes a first segment and a second segment arranged at intervals, and the first segment and the second segment are respectively connected with the other ends of the two microstrip lines to form A branch port for signal transmission; another coupling line of the broadband balun is arranged in one body and is lengthwise, capacitively coupled with the first segment and the second segment, and any end of it is a signal transmission end. Through the above method, the electric bridge of the present invention can output the in-phase signal and the anti-phase signal, realize 0° and 180° phase shift, and increase the bandwidth of the working frequency band at the same time.

Description

Technical field [0001] The present invention relates to the field of electronic information and mobile communication, in particular to an electric bridge. Background technique [0002] Depending on the phase of the output port, the bridge can be divided into a 90° phase-shifting bridge and a 180° phase-shifting bridge. The 90° phase-shifting bridge is generally realized by parallel coupling lines, which is characterized by wide operating frequency and high port isolation. The 180° phase-shifting bridge is generally realized by a ring-shaped bridge. The function of the ring-shaped bridge is mainly the synthesis and branching of signals, which has the advantages of small size and low cost. The 180° phase-shifting bridge is widely used in the field of mobile communication. For example, in a specific antenna feeder system, the 180° phase-shifting bridge can achieve in-phase output signals or reverse-phase output signals. [0003] With the widening of the mobile communication frequenc...

AI Technical Summary

Problems solved by technology

[0003] With the widening of the mobile communication frequency band, the existing 180° phase-shifting bridge ring bridge can no longer meet the index requirements under the wide frequency band

The improved 180° phase-shift bridge (replacing the 3λ / 4-line narrowband balun with the coupled line broadband balun on the balun structure) can improve the bandwidth of the ring bridge to a certain extent, but the bandwidth is still limited, and the input The position of the output port is relatively fixed, so it is not easy to be widely used

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