Summary
International Symposium on Antennas and Propagation
2006
Session Number:3POS
Session:
Number:3POS-19
Analogue phase-shifter employing fluid-filled connected micro-cavities
Hongyan Tang, R.S.Donnan, C.G.Parini,
pp.1-4
Publication Date:2006/11/2
Online ISSN:2188-5079
Summary:
In this paper, a novel analogue phase-shifter based on a simple coplanar waveguide (CPW), over-laying E-shapeconnected micro-cavities, was presented. High dielectric constant fluid filled the volumes of cavities to variable fractions. By employing micro-pumps to regulate the volume of fluid in the vicinity of the transmission line, it has the potential of achieving dynamic phase-shifting. Both numerical and experimental analyses have been undertaken from 1.9 GHz to 2.2 GHz for application to semi-smart basestation antenna systems. A maximum phase-shift of 81° was measured at 2.0 GHz and simulation yielded 93°. The measured return loss was better than -15 dB and average insertion loss was -1.5 dB. According to exponential mixing rules and non-linear least square method, an empirical formula was obtained to match the measurement.