Multi-band cellular basestation antenna
First Claim
Patent Images
1. A dual band base station antenna comprising:
- a first set of radiating elements operable at a first frequency range having a centre-band wavelength λ
1 and a centre-band frequency f1;
a second set of radiating elements operable at a second frequency range having a centre-band wavelength λ
2 and a centre-band frequency f2;
and a ground plane;
wherein the centre-band frequency f1 of the first frequency range is of the order of ¼
-¾
of the centre-band frequency f2 of the second frequency range;
wherein the first set of radiating elements is arranged in two columns spaced less than λ
1 apart;
wherein the second set of radiating elements are interleaved around the two columns of the first set of radiating elements, the second set of radiating elements being spaced less than λ
2 apart; and
wherein the elements are spaced apart from the ground plane.
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Abstract
The present invention relates to a multi-band cellular basestation and in particular relates to antennas for such basestations. There is a growing need for mult-band basestation antennas for mobile communication systems, to serve existing 2nd generation systems, and emerging third generation systems. For example, GSM and DCS1800 systems currently coexist in Europe, and emerging 3rd generation systems (UMTS) will initially have to operate in parallel with these systems. The present invention provides a dual/triple/multi-band performance cellular basestation antenna having a shared aperature, having a first set of radiating elements operable at a first frequency range; a second set of radiating elements operable at a second frequency range; wherein the first set and second set of radiating elements are arranged in an interleaved fashion.
111 Citations
14 Claims
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1. A dual band base station antenna comprising:
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a first set of radiating elements operable at a first frequency range having a centre-band wavelength λ
1 and a centre-band frequency f1;
a second set of radiating elements operable at a second frequency range having a centre-band wavelength λ
2 and a centre-band frequency f2;
and a ground plane;
wherein the centre-band frequency f1 of the first frequency range is of the order of ¼
-¾
of the centre-band frequency f2 of the second frequency range;
wherein the first set of radiating elements is arranged in two columns spaced less than λ
1 apart;
wherein the second set of radiating elements are interleaved around the two columns of the first set of radiating elements, the second set of radiating elements being spaced less than λ
2 apart; and
wherein the elements are spaced apart from the ground plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A base station equipped with a dual band antenna comprising a first set of radiating elements operable at a first frequency range having a centre-band wavelength λ
-
1 and a centre-band frequency f1;
a second set of radiating elements operable at a second frequency range having a centre-band wavelength λ
2 and a centre-band frequency f2;
and a ground plane;
wherein the centre-band frequency f1 of the first frequency range is of the order of ¼
-¾
of the centre-band frequency f2 of the second frequency range;
wherein the first set of radiating elements is arranged in two columns spaced less than λ
1 apart;
wherein the second set of radiating elements are interleaved around the two columns of the first set of radiating elements, the second set of radiating elements being spaced less than λ
2 apart; and
wherein the elements are spaced apart from the around plane.
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1 and a centre-band frequency f1;
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12. A method of operating a dual band antenna, said antenna comprising:
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a first set of radiating elements operable at a first frequency range having a centre-band wavelength λ
1 and centre-band frequency f1;
a second set of radiating elements operable at a second frequency range having a centre-band wavelength λ
2 and a centre-band frequency f2;
and a ground plane;
wherein the centre-band frequency f1 of the first frequency range is of the order of ¼
-¾
of the centre-band frequency f2 of the second frequency range;
wherein the first set of radiating elements is arranged in two columns spaced less than λ
1 apart;
wherein the second set of radiating elements are interleaved around the two columns of the first radiating elements, the second set of radiating elements being spaced less than λ
2 apart; and
wherein the first and second sets of elements are spaced apart from the ground plane;
wherein, in a transmit mode, the method comprises the steps of feeding signals to either of the first and second sets of radiating elements; and
wherein, in a receive mode, the method comprises the steps of receiving incoming signals using either of the first and second sets of radiating elements. - View Dependent Claims (13, 14)
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Specification
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Current AssigneeApple Inc.
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Original AssigneeNortel Networks Limited (Nortel Networks Corporation)
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InventorsSmith, Martin, Kitchener, Dean, Power, Dawn K
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Primary Examiner(s)PHAN, THO GIA
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Application NumberUS09/473,722Time in Patent Office462 DaysField of Search343/813, 343/844, 343/797, 343/700 MS, 343/853, 343/810, 343/811, 343/812, 343/814, 343/815, 343/816, 343/817, 343/818, 343/819, 343/820, 343/846, 343/848US Class Current343/813CPC Class CodesH01Q 1/246 specially adapted for base ...H01Q 15/0013 said selective devices work...H01Q 21/062 using dipole aerials; H01Q2...H01Q 5/42 using two or more imbricate...
