On the Coupling Imbalance of the UWB BLC in the 5G Low Noise Amplifier Design

In this article, the design and development of ultra-wideband UWB branch-line couplers BLCs with a novel method to control coupling imbalance are proposed. The proposed BLC is suitable for 5G low-noise amplifier (LNA) design. 4-branch designed using curves developed even odd mode analyses cover (3.3-5 GHz) frequency bands. vertical branches replaced by modified ones, their effect on investigated. occupies an area 33.9 × 15.7 mm2 Both conventional fabricated, measured S-parameters compared analytical simulated models. Based balanced topology, designed. MGF3022AM InGaP-HBT (Heterojunction Bipolar Transistor) used produce acceptable performance. return loss, noise figure, gain investigated as varies. LNA exhibits small-signal gain, input output loss across different