The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2006
Filed:
Feb. 15, 1999
Simon Reza Saunders, Ash, GB;
Andreas-albertos Agius, Patras, GR;
Simon Reza Saunders, Ash, GB;
Andreas-Albertos Agius, Patras, GR;
University of Surrey, Surrey, GB;
Abstract
A multifilar antenna () comprises n spaced antenna filaments, where n is on integer greater thana matching circuit () for matching the characteristic impedance of the antenna to that of a transmitting and/or receiving apparatus; a weighting circuit () for applying respective gain and phase adjustments to signals passed to or from the n filaments; switch means () associated with each filament for selectively altering the electrical length and/or interconnections of the filaments; means for detecting electrical properties of the multifilar antenna with respect to the frequency, polarisation and/or direction of propagation of a signal to be received or transmitted by the multifilar antenna and/or impedance matching of the antenna; and control means (), responsive to the detective means, for controlling the operation of the matching circuit (), the weighting circuit () and the switch means () to adjust the properties of the multifilar antenna () to suit better a current signal to be received or transmitted.