A conducting-polymer patch antenna is fabricated using a screen-printing technique. Polyaniline (Pani) film of conductivity 6000 S/m, permittivity 6000, and thickness 100 μm is used as a radiating patch to realize a microstrip-fed proximity-coupled Pani-patch antenna operating at around 10 GHz. Ansoft-HFSS was used as a design tool to validate the experimental measurements of the antenna. The measured and simulated results of the resonant frequency, return loss, gain, bandwidth, and radiation patterns are presented. The simulations and measurements are performed on both copper- and Pani-antennas for comparison. Details of the design considerations and the simulation and experimental results are presented and discussed. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 48: 655–660, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21435 [ABSTRACT FROM AUTHOR]