Mountain-Shaped Coupler for Ultra Wideband Applications
This paper demonstrates a novel mountain-shaped design for a compact 3-dB coupler operating at ultra-wideband (UWB) frequencies from 3.1GHz to 10.6 GHz. The proposed design was accomplished using multilayer technology in which the structure is formed by three layers of conductors interleaved by a layer of substrate between each conductor layer. Simulation was carried out using CST Microwave Studio; the result was then compared with results from rectangular and star-shaped couplers that implemented the same technique. The results obtained show that the proposed new coupler has better performance compared to both rectangular and star-shaped coupler designs in terms of return loss, isolation, and phase difference. The coupler was fabricated and measured; the measurement results satisfactorily agree with the simulation results.
KeywordsUltra-wideband frequency, coupler design, beam-forming, Butler matrix, multilayer technology
Document typePeer reviewed
Document versionFinal PDF
SourceRadioengineering. 2013, vol. 22, č. 3, s. 745-750. issn 1210-2512
- 2013/3