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VCO active integrated antenna with reactive impedance surfaces
Author(s) -
Urbani Fabio,
Bilotti Filiberto,
Alù Andrea,
Vegni Lucio
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21088
Subject(s) - antenna (radio) , engineering , electrical engineering , electronic engineering , frequency band , electrical impedance , voltage controlled oscillator , input impedance , microwave , voltage , telecommunications
In this paper, we present the design of an active integrated antenna (AIA) using a voltage‐controlled oscillator (VCO) for applications in the Industrial Scientific Medical (ISM) band (2.4 to 2.4835 GHz). The realized active circuit makes use of compact devices in surface‐mounting device (SMD) technology, while the passive radiating element is placed over a reactive‐impedance surface (RIS), properly designed to show an inductive surface impedance within the operative frequency band. The final layout has been optimized in terms of dimensions to achieve the integration of the antenna and the active/transmissive circuits on the opposite faces of a Personal Computer Memory Card International Association (PCMCIA) card. The design is conducted through the employment of a rigorous method of moments (MoM) formulation, used for the design of the antenna, and of a commercial tool for the nonlinear analysis of the active circuitry. Some preliminary experimental results are also presented to illustrate the features of the antenna here proposed. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 82–86, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21088