Open AccessTheoretical analysis and design of a compact analogue phase shifter with constant low insertion loss
Author(s) -
Jiang Yuan,
Lin Xian Qi,
Wang Bao,
Tang Cong
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2018.0126
Subject(s) - insertion loss , phase shift module , constant (computer programming) , phase (matter) , electronic engineering , electrical engineering , materials science , engineering , mathematics , computer science , physics , quantum mechanics , programming language
An analogue phase shifter with a constant low insertion loss (IL) and compact size is proposed. It consists of two quarter wavelength transmission lines and three tunable reflective loads. The theoretical analysis to maximise the relative phase shift, reduce the IL and the IL variation of the phase shifter is presented explicitly, which provides performance estimation and design guidance for this class phase shifter. A circuit with a size of 0.12 λ g × 0.21 λ g is designed and fabricated to verify the theory. The simulated and measured results are in good agreement. The measurement shows that the relative phase shift of the proposed phase shifter is 186° at 1.97 GHz. The average IL is 0.79 dB with a very small IL variation which is just 0.02 dB.