Multi-resonance antenna, antenna module, radio device and methods
First Claim
1. A multiband antenna for use in a radio device, comprising:
- a circuit board comprising a ground plane disposed on a first portion of the circuit board, the circuit board further comprising a second portion on which the ground plane is not disposed;
a dielectric component disposed on the second portion of the circuit board;
a first and a second radiating element resident on an upper surface of the dielectric component, the first and the second radiating elements configured to radiate at a lower and an upper frequency band, respectively; and
a parasitic element disposed on a plurality of surfaces of the dielectric component that are perpendicular to the ground plane of the circuit board.
1 Assignment
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Accused Products
Abstract
An internal dual band antenna meant for small radio devices. In one embodiment, the antenna contains two radiators and a parasite element, which is shared between them. The parasite element is implemented on three sides of the antenna module, which are perpendicular to the side where the two radiators are implemented. The short-circuit conductor of the parasite element extends close to the supply point/points of the antenna on the circuit board of the radio device and is connected to the ground plane of the radio device. The antenna structure is dimensioned such that the two resonance frequencies on both functional bands are at a lower frequency than the resonance frequencies of the actual radiators. Accordingly, both the lower and upper frequency band is widened. The shape of the parasite element does not weaken the adaptation of the antenna in either functional band.
472 Citations
23 Claims
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1. A multiband antenna for use in a radio device, comprising:
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a circuit board comprising a ground plane disposed on a first portion of the circuit board, the circuit board further comprising a second portion on which the ground plane is not disposed; a dielectric component disposed on the second portion of the circuit board; a first and a second radiating element resident on an upper surface of the dielectric component, the first and the second radiating elements configured to radiate at a lower and an upper frequency band, respectively; and a parasitic element disposed on a plurality of surfaces of the dielectric component that are perpendicular to the ground plane of the circuit board. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A multiband antenna for use in a radio device, comprising:
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a circuit board comprising a ground plane; a dielectric piece that is installed on a first end of the circuit board, the first end of the circuit board having the ground plane removed; first and second monopole-type elements resident on an upper surface of the dielectric piece, the first and second monopole-type elements being configured to radiate in separate frequency bands, the first and second monopole-type elements corresponding to lower and upper frequency bands, respectively; and a parasitic element that is electromagnetically coupled to the first and second monopole-type elements, the parasitic element being disposed on at least one surface of the dielectric piece; wherein the electromagnetic coupling between the first and second monopole-type elements and the parasitic element is formed at least in part by a predominantly inductive connection of a conductive strip departing from a connecting point of the parasitic element and the first and second monopole-type elements; and wherein a magnitude of the predominantly inductive connection is determined at least in part by a distance between first and second supply points and the connecting point of the parasitic element. - View Dependent Claims (9, 10)
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11. A multi-band antenna configured for use in a radio device, comprising:
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a dielectric piece, which comprises a first surface; a first and a second monopole-type elements that radiate on a lower and an upper band, respectively, with supply points of the first and the second monopole-type elements being resident on a second surface of the dielectric piece, the second surface being substantially parallel to the first surface; and a parasitic element on at least one surface of the dielectric piece, the parasitic element forming an angle in relation to the first and the second surface; wherein the multi-band antenna is configured to provide on both the lower band and the upper band two resonance locations in order to widen the frequency range of the lower and upper bands; wherein a resonance of the lower band is caused by the parasitic element and a resonance of the upper band comprises a natural resonance of the first and the second monopole-type elements; and wherein the parasitic element comprises a U-shape, a bottom part of the U-shape being situated at an end side of the multi-band antenna, and one or more adjacent sides of the U-shape being situated in a direction of a longitudinal axis of the radio device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A radio device (RD), comprising:
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at least one internal multi-band antenna comprising at least a first and a second functional band, the at least one internal multi-band antenna comprising a first monopole-type element configured to radiate on a lower frequency band and a second monopole-type element configured to radiate on an upper frequency band; and a parasitic element electromagnetically coupled to the first and second monopole-type elements, the first and second monopole-type elements being coupled to at least one supply point connected to an antenna port of the radio device, the parasitic element being coupled from a short-circuit point to a ground plane of the radio device; wherein the first monopole-type element of the lower frequency band is arranged to be supplied from the at least one supply point connected to the antenna port, the first monopole-type element together with other parts of the multi-band antenna comprising a first resonator, a natural frequency of the first resonator being in the lower frequency band; wherein the second monopole-type element of the upper frequency band is arranged to be supplied from the at least one supply point connected to the antenna port, the second monopole-type element comprising a second resonator, a natural frequency of the second resonator being in the upper frequency band; wherein the parasitic element is grounded only from a connecting point to the ground plane of the radio device, the parasitic element together with the other parts of the multi-band antenna comprising a third resonator; wherein both the lower frequency band and the upper frequency band have two resonance locations in order to widen the first and the second functional band, respectively, the resonance location associated with the lower frequency band being caused by the parasitic element and the resonance location associated with the upper frequency band being caused by the first and second monopole-type elements; and wherein the parasitic element comprises a U-shape, a bottom part of the U-shape is on a side comprising a first outer end of the radio device, and the parasitic element is divided at a connection point of a short-circuit conductor into a first branch and a second branch, arms of the first and second branches of the parasitic element being on a third and a fourth side of the radio device. - View Dependent Claims (23)
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Specification