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US 5,627,551 AGranted
Antennas for surface mounting and method of adjusting frequency thereof
AssigneeMurata Manufacturing Co., Ltd.
InventorsTeruhisa Tsuru, Toshifumi Oida
Life of this patent
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Abstract
An antenna adapted for surface mounting has a dielectric substrate on which are attached at least one primary grounding electrode and a connector electrode which together serve as a capacitor, at least one secondary grounding electrode formed adjacent to but insulated from the connector electrode, and a radiative member disposed thereover for emitting electromagnetic radiation. The resonant frequency of this antenna can be adjusted by trimming either its connector electrode or one of the secondary grounding electrode.
Claims7
An antenna for surface mounting, comprising:
- a dielectric substrate having a top surface, a bottom surface and side surfaces therebetween;
- at least one primary grounding electrode on said dielectric substrate;
- a connector electrode on said dielectric substrate, said primary grounding electrode and said connector electrode together serving as a capacitor;
- at least one secondary grounding electrode formed adjacent to but insulated from said connector electrode, said secondary grounding electrode and said connector electrode together serving as a second capacitor for adjusting the resonance frequency of said antenna;
- and
- a radiative member disposed on said dielectric substrate, said radiative member having a principal surface, a first holder and a second holder, said first and second holders extending from said principal surface and supporting said dielectric substrate therebetween, said first holder having a power feed electrode and a grounding terminal formed at one end thereof, and said second holder being connected to said connector electrode on said dielectric substrate.
3 more elements
Dependencies are inferred from the claim text.