Method for tuning an antenna and an antenna
First Claim
1. A method for tuning an antenna structure which comprises a dielectric block and a conductive antenna element on two opposing surfaces of the dielectric block, in which method the resonance frequency of the antenna structure is measured and material is removed from the antenna structure in order to increase the resonance frequency, whereinremoval of material is directed to the dielectric block, and dielectric material is removed until the measured resonance frequency of the antenna structure has reached with a certain accuracy the nominal resonance frequency corresponding to the band specified for the antenna structure.
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Abstract
The invention relates to a method for tuning dielectric antennas designed for operation especially in the microwave range, and an antenna structure. An antenna is tuned by removing material (211) from a dielectric block (210) located between conductive elements, whereby the resonance frequency of the antenna increases. The conductive elements (220, 230) on opposing surfaces of the dielectric block are advantageously shaped identical and located symmetrically with respect to each other so that the tuning of the antenna will not affect the other electrical characteristics of the antenna apart from the resonance frequency. With the method according to the invention there is no risk of producing conductive chips resulting from the working of metallic elements, the tuning of the antenna becomes accurate, and structural faults in the medium will be automatically compensated for.
46 Citations
11 Claims
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1. A method for tuning an antenna structure which comprises a dielectric block and a conductive antenna element on two opposing surfaces of the dielectric block, in which method the resonance frequency of the antenna structure is measured and material is removed from the antenna structure in order to increase the resonance frequency, wherein
removal of material is directed to the dielectric block, and dielectric material is removed until the measured resonance frequency of the antenna structure has reached with a certain accuracy the nominal resonance frequency corresponding to the band specified for the antenna structure.
- 5. An antenna structure comprising a dielectric block, a first conductive antenna element on a first surface of the dielectric block, and a second conductive antenna element on a second, opposing, surface of the dielectric block, which first conductive antenna element has a point to be connected to a feed conductor of the antenna structure and a point to be connected to signal ground, wherein the second conductive antenna element has at least one point to be connected to signal ground, and the first and the second conductive antenna elements are substantially equal in size to tune the antenna structure by changing the form of the dielectric block.
- 10. An apparatus with an antenna comprising a dielectric block, a first conductive antenna element on a first surface of the dielectric block, and a second conductive antenna element on a second, opposing, surface of the dielectric block, which first antenna element has a point to be connected to a feed conductor of the antenna and a point to be connected to signal ground, wherein the second conductive antenna element has at least one point to be connected to signal ground, and the first and the second conductive antenna elements are substantially equal in size to tune the antenna structure by changing the form of the dielectric block.
Specification