Compact power divider for wideband in‐phase and out‐of‐phase performances using parallel coupled lines. Issue 19 (1st September 2017)

• Record Type: Journal Article
• Authors: Ahmed, U.; Abbosh, A.
• Is Part Of: Electronics letters. Volume 53:Issue 19(2017)
• Page Start: 1312
• Page End: 1314
• Publication Date: 2017-09-01
• Subjects: power dividers -- coupled transmission lines -- impedance matching; compact power divider -- out‐of‐phase power divider performances -- wideband in‐phase power divider performances -- parallel coupled lines -- Wilkinson power divider -- stepped impedance T‐junction -- input port impedance matching -- chip capacitor -- return loss -- isolation loss -- frequency 1 GHz to 3 GHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2017.2289
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A novel structure that can operate as an in‐phase and out‐of‐phase power divider across 100% fractional bandwidth is presented. The proposed structure adopts two pairs of parallel‐coupled lines to enable changing the operation from in‐phase to out‐of‐phase while improving the return loss and isolation of a traditional Wilkinson power divider. Moreover, the device includes a stepped impedance T‐junction for input port impedance matching. Changing the status of two terminals of one pair of coupled lines from open‐ended to short‐ended allows achieving changing the operation from in‐phase to out‐of‐phase performance. Using a chip capacitor between the coupled lines enables realising the needed tight coupling without the need to have narrow gaps. A prototype is fabricated and measured. Simulated and measured results show more than 10 dB of return loss and more than 15 dB of isolation across the investigated band 1–3 GHz. In addition, the device provides <1° phase imbalance and 0.2 dB amplitude imbalance in the in‐phase and out‐of‐phase states across the whole frequency band.