Antenna device and radio communication equipment including the same
AssigneeMurata Manufacturing Co., Ltd.
InventorsShoji Nagumo, Kengo Onaka, Takashi Ishihara, Jin Sato
Life of this patent
Estimating the term…
Abstract
A feed radiation electrode including two branched radiation electrodes is provided on the surface of a substrate. Non-feed radiation electrodes are provided on both sides of the feed radiation electrode and near the branched radiation electrodes. The branched radiation electrode and the non-feed radiation electrode are double-resonated in the same frequency band. The branched radiation electrode and the non-feed radiation electrode are double-resonated in the same frequency band which is higher than that of the branched radiation electrode and the non-feed radiation electrode.
Claims15
An antenna device comprising:
- a substrate made of one of a dielectric material and a magnetic material;
- a feed element disposed on the substrate and including a feeding terminal and a feed radiation electrode electrically coupled to the feeding terminal, the feed radiation electrode including a plurality of branched radiation electrodes, each of the plurality of branched radiation electrodes having one common end and extended ends defining open ends;
- and
- a plurality of non-feed elements disposed on the substrate, each of the plurality of non-feed elements including a ground terminal and a non-feed radiation electrode electrically coupled to the ground terminal, the non-feed radiation electrode extending from the ground terminal and including an extended end defining an open end;
- wherein
- each of the plurality of non-feed radiation electrodes is disposed along and in the vicinity of a respective one of the plurality of branched radiation electrodes of the feed radiation electrode;
- each of the non-feed radiation electrodes is disposed along an outer edge of the respective one of the plurality of branched radiation electrodes of the feed radiation electrode;
- a space between adjacent ones of the plurality of branched radiation electrodes gradually increases from the common end to the open ends;
- each of the plurality of branched radiation electrodes has a resonant frequency in a different frequency band from the remaining one of the plurality of branched radiation electrodes, and each of the plurality of non-feed radiation electrodes has a resonant frequency in a different frequency band from that of the remaining one of the plurality of non-feed radiation electrodes, such that each of the plurality of non-feed radiation electrodes disposed along and in the vicinity of a respective one of the plurality of branched radiation electrodes defines a double-resonance pair, and each of the double-resonance pairs double-resonate at a frequency band that is different from the remaining double-resonance pairs.
Dependencies are inferred from the claim text.