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A novel technique to implement frequency hopping planar antennas with a computer interface
Author(s) -
Majumder A.,
Chakravarty T.,
Saran S.,
Sanyal S. K.
Publication year - 2003
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.11035
Subject(s) - varicap , microstrip antenna , microstrip , antenna (radio) , electronic engineering , asynchronous communication , engineering , electrical engineering , planar , interface (matter) , microwave , computer science , telecommunications , physics , capacitance , pulmonary surfactant , gibbs isotherm , computer graphics (images) , electrode , quantum mechanics , chemical engineering
In this paper, a novel configuration for a computer‐controlled frequency hopping microstrip antenna is presented. A circular microstrip antenna, loaded with a series LC tuned circuit in the form of a varactor diode with a metallic pin, is electronically tuned by sending digital words using the asynchronous serial communication facility of a computer. An analytical formulation, useful for the design of such an antenna, is presented. A computer interface circuit has been developed which, unlike embedded systems, offers flexibility in the choice of hopping sequence and facilitates remote operation. Design details and measured results are given. The results illustrate the feasibility of the proposed scheme to convert a low‐profile antenna into an adaptive antenna system. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 38: 270–274, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11035