Active ultra-wideband balanced-unbalanced transformation converter

Abstract

The invention discloses an active ultra wide band balance-unbalance transformation converter comprising a receiving antenna connector electrically connected to an ultra wide band antenna and configured to receive a differential balance current carrying a transmission signal from the ultra wide band antenna; an impedance matcher that matches impedance for the differential balanced current for the ultra-wideband antenna; a differential amplifier configured to receive the differential balanced current from the impedance matcher and perform signal amplification; a filter which is configured to receive the amplified differential balance current from the differential amplifier and perform signal filtering; a high-frequency transformer which is configured to receive the filtered differential balanced current from the filter and convert the differential balanced current into a single-end unbalanced current; and a feeder cable connector which is electrically connected to the coaxial feeder cable and configured to receive the single-ended unbalanced current from the high-frequency transformer and transmit the single-ended unbalanced current to the coaxial feeder cable. According to the invention, insertion loss can be reduced, bandwidth can be improved, current balance degree can be improved, and impedance conversion and matching can be realized.

Description

technical field [0001] The invention relates to the field of electromagnetic compatibility, and more specifically refers to an active ultra-wideband balanced-unbalanced transformer. Background technique [0002] In the EMC (electromagnetic compatibility) test of electronic products, it is necessary to use an ultra-wideband antenna to receive electromagnetic waves in various frequency bands to complete the test. The current on the UWB antenna must be a balanced current to avoid radiation and system interference caused by the unbalanced current on the antenna feeder; at the same time, the shielding layer of the coaxial cable applied to the antenna feeder is grounded, so the The current is a single-ended unbalanced current. In this way, it is necessary to add an ultra-wideband balanced-unbalanced transformer (in some technical documents, also known as a balun) between the feeder and the ultra-wideband antenna to realize the ultra-wideband balanced-unbalanced conversion. At th...

AI Technical Summary

Problems solved by technology

This method brings insertion loss to the system, and the low frequency bandwidth is limited, making it difficult to adjust the matching impedance

[0007] There is no effective solution to the problems of large insertion loss, low bandwidth, unbalanced current, and difficulty in adjusting matching impedance of various balanced-unbalanced transformers in the prior art.

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