H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
H01Q 13/08 (2006.01) H01Q 1/36 (2006.01) H01Q 9/04 (2006.01) H01Q 9/30 (2006.01) H01Q 21/28 (2006.01) H04Q 7/32 (2006.01)
Patent
CA 2334721
A microstrip antenna (MSA) above a ground plane, having a size corresponding to an operation frequency, at a junction point thereof, electrically connected to one end of a monopole antenna having a size corresponding to the operation frequency to operate as a complex antenna. A distance between the feed point of MSA and the junction point determines the input impedance for matching. A microstrip line or an (planar) inverted-F antenna may provide the MSA. The monopole element may be a monopole antenna or helical antenna. A portable wireless communication apparatus includes the antenna apparatus having a housing. The monopole antenna is connected to the MSA when the monopole antenna is extended from the housing. A switch may be provided between the monopole antenna and the MSA for diversity operation. The antenna apparatus may be formed on a Printed circuit board and folded.
Haruki Hiroshi
Nishikido Tomoaki
Saitou Yutaka
Gowling Lafleur Henderson Llp
Matsushita Electric Industrial Co. Ltd.
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