Adjustable antenna apparatus and methods
First Claim
1. An adjustable antenna, comprising:
- a ground plane;
a monopole type radiator with a feed point and first and second slots;
an adjusting circuit configured to enable adjustment of at least one operating frequency of the adjustable antenna;
an adjusting point in communication with the monopole type radiator and the adjusting circuit;
a short-circuit point disposed on the ground plane; and
a feed point disposed between the short-circuit point and the adjusting point;
wherein the adjusting point is disposed substantially between the first and second slots.
2 Assignments
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Accused Products
Abstract
An adjustable monopole antenna apparatus and methods. In one embodiment, the antenna apparatus is intended for mobile terminals. In an exemplary implementation, there is an adjusting point is provided from which a conductor is branched to an adjusting circuit. The adjusting circuit comprises a switch and alternative reactive elements connected to ground, selectable by the switch. When a reactive element is changed, the electric length and resonance frequency of the radiator change, and the corresponding operating band shifts. If the antenna is configured as a dual-band antenna, the above-mentioned operating band is the lower band. One or more higher operating bands are based e.g. on radiating slots implemented by the same radiator conductor. The operating band of the exemplary embodiment of the antenna below the frequency 1 GHz can be shifted in a wider range than in the corresponding known antennas.
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Citations
19 Claims
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1. An adjustable antenna, comprising:
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a ground plane; a monopole type radiator with a feed point and first and second slots; an adjusting circuit configured to enable adjustment of at least one operating frequency of the adjustable antenna; an adjusting point in communication with the monopole type radiator and the adjusting circuit; a short-circuit point disposed on the ground plane; and a feed point disposed between the short-circuit point and the adjusting point; wherein the adjusting point is disposed substantially between the first and second slots. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification