K-Band Graphene-Based Electrically Tunable Hybrid Coupler

IEEE Asia-Pacific Microwave Conference (APMC), pp. 1281–1283

Abstract

This work presents the design, implementation, and characterisation of an electrically tunable quadrature hybrid coupler. The design exploits a lumped-element configuration which utilizes four metal-insulator-graphene diodes to minimise the footprint. The fabricated prototype is realised on a thinfilm flexible polyimide (PI) substrate. The assessment of the fabricated circuit reveals a good and wideband S11performance and an S21measurement of −4.2 dB with a tolerance of 0.2 dB across the frequency band of 18–27 GHz. The introduced thin-film technology promotes the realisation of flexible compact reconfigurable transceivers that cover several frequency bands.

Authors 4

1. Eyyub Baskent Aachen Chair of High Frequency Electronics

   RWTH Aachen University

   Affiliation as printed

   Chair of High Frequency Electronics RWTH Aachen University,Aachen,Germany

2. Zhenxing Wang Aachen AMO GmbH

   AMO (Germany)

   Affiliation as printed

   AMO GmbH,Aachen,Germany

3. Max C. Lemme Aachen AMO GmbH

   AMO (Germany)

   Affiliation as printed

   AMO GmbH,Aachen,Germany

4. Renato Negra Aachen Chair of High Frequency Electronics

   RWTH Aachen University

   Affiliation as printed

   Chair of High Frequency Electronics RWTH Aachen University,Aachen,Germany