US6028563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual polarized cross bow tie dipole antenna having integrated airline feed
Assignee: Alcatel Lucent SAS
•
Filing: 1998-07-09
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Granted: 2000-02-22
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Expires: 2018-07-09
Abstract
Abstract A dual polarization antenna for transmitting/receiving polarized radio frequency signals includes a reflector plate that reflects the polarized radio frequency signals and one or more dipole assemblies. Each dipole assembly has two cross bow tie dipoles having radiating arms for transmitting/receiving the polarized radio frequency energy signals at two polarizations, and having U-shaped air-filled transmission feedlines for supporting respective radiating arms and providing the radio frequency signals between the reflector plate and the respective radiating arms. Each U-shaped air-filled transmission feedline includes two legs and respective feed rods arranged in respective legs. Each leg has a rectangular shape with three sides for isolating undesirable radio frequency energy. The radiating arms are triangularly-shaped and have notches dimensioned for minimizing radiation pattern distortion due to undesirable radio frequency coupling between the two cross bow tie dipoles. The dual polarization antenna also has an RF isolation device for coupling RF energy back in a proper phase and magnitude to cancel the undesirable RF energy of the respective opposite polarization. The RF isolation device includes an isolation tree or bar, isolation rails, small thin isolation rods or wires arranged in relation to the dipole assembly, or an isolation strip between positive and negative arms of the cross bow tie dipoles; or a combination of one or more of the above.
Inventors
- 👤 Thomas P. Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:56
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/246; H01Q1/52; H01Q1/521; H01Q1/523; H01Q21/00; H01Q21/06; H01Q21/08; H01Q21/12; H01Q21/14; H01Q21/16; H01Q21/24; H01Q21/26
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
192 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) for transmitting or receiving polarized radio frequency signals, comprising: a reflector plate (22, 152, 202, 302, 402) that is a ground plane and that reflects the polarized radio frequency signals; one or more bow tie assemblies (24; 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104; 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176; 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226; 304, 306, 308, 310, 312, 314, 316, 318, 320, 322, 324, 326; 404, 406, 408, 410, 412, 414, 416, 418, 420, 422, 424, 426; 500), each having two cross bow tie dipoles (26, 28) with radiating arms (40, 42; 60, 62) for transmitting or receiving the polarized radio frequency signals at two polarizations, each cross bow tie dipoles (26, 28) also having U-shaped air-filled transmission feedline means (30, 32, 34; 50, 52, 54) for supporting respective radiating arms (40, 42; 60, 62) and for providing the polarized radio frequency signals between the reflector plate (22, 152, 202, 302, 402) and said respective radiating arms (40, 42; 60, 62).
Claim 2
Dependent Claim
192 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) for transmitting or receiving polarized radio frequency signals, comprising: a reflector plate (22, 152, 202, 302, 402) that is a ground plane and that reflects the polarized radio frequency signals; one or more bow tie assemblies (24; 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104; 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176; 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226; 304, 306, 308, 310, 312, 314, 316, 318, 320, 322, 324, 326; 404, 406, 408, 410, 412, 414, 416, 418, 420, 422, 424, 426; 500), each having two cross bow tie dipoles (26, 28) with radiating arms (40, 42; 60, 62) for transmitting or receiving the polarized radio frequency signals at two polarizations, each cross bow tie dipoles (26, 28) also having U-shaped air-filled transmission feedline means (30, 32, 34; 50, 52, 54) for supporting respective radiating arms (40, 42; 60, 62) and for providing the polarized radio frequency signals between the reflector plate (22, 152, 202, 302, 402) and said respective radiating arms (40, 42; 60, 62).
Claim 3
Dependent Claim
55 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 1, wherein each U-shaped air-filled transmission feedline means (30, 32, 34; 50, 52, 54) includes two legs (30, 32; 50, 52) and a respective feed rod (34; 54) arranged in a respective one of the two legs (30, 32; 50, 52).
Claim 4
Dependent Claim
40 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 2, wherein each leg (30, 32; 50, 52) has a rectangular shape with at least three sides (66, 68, 70) for isolating undesirable radio frequency energy.
Claim 5
Dependent Claim
127 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 2, wherein the characteristic impedance of each U-shaped rectangular air-filled transmission feedline means (30, 32, 34; 50, 52, 54) is substantially the same as the impedance of a respective cross bow tie dipole (26, 28), and is calculated by the following equation: ##EQU2## where D is a one-sided or open dimension of the respective U-shaped rectangular air-filled transmission feedline means (30, 32, 34; 50, 52, 54), d is a diameter of a respective feed rod (34; 54), and h is a distance from a respective single wall of the respective U-shaped rectangular air-filled transmission feedline means (30, 32, 34; 50, 52, 54) to a respective center of the respective feed rod (34; 54).
Claim 6
Dependent Claim
63 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 1, wherein the respective radiating arms (40, 42; 60, 62) include triangularly-shaped arms (40, 42; 60, 62), each having notches (40a, 40b; 42a, 42b; 60a, 60b; 62a, 62b) dimensioned for minimizing radiation pattern distortion due to undesirable radio frequency coupling between the two cross bow tie dipoles (26, 28).
Claim 7
Dependent Claim
85 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 5, wherein each triangularly-shaped arm has an inner corner (46a) with a 90 degree angle, two outer corners (46b, 46c) having respective 45 degree angles, and a respective side (46d, 46e) in relation to the inner corner (46a) and the two outer corners (46b, 46c), each outer corner (46b, 46c) having a respective symmetrical notch (40a, 40b; 42a, 42b; 60a, 60b; 62a, 62b) cut therein along the respective side (46d, 46e).
Claim 8
Dependent Claim
41 words
A dual polarization antenna according (20, 80, 150, 200, 300, 400, 500) to claim 6, wherein each respective symmetrical notch (40a, 40b; 42a, 42b; 60a, 60b; 62a, 62b) has an edge substantially 46f, 46g) parallel to the respective side (46d, 46e).
Claim 9
Dependent Claim
56 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 7, wherein each respective side (46d, 46e) has a length (Ls) and each symmetrical notch (40a, 40b; 42a, 42b; 60a, 60b; 62a, 62b) has a corresponding length (Ln) that is substantially equal to the length (Ls) of the respective side (46d, 46e).
Claim 10
Dependent Claim
54 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 8, wherein the corresponding length (Ln) of each symmetrical notch (40a, 40b; 42a, 42b; 60a, 60b; 62a, 62b) and the length (Ls) of the respective side (46d, 46e) are dimensioned with a ratio in a range of 1:3 to 3:1.
Claim 11
Dependent Claim
46 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 1, wherein the radio signals include a first radio signal and a second radio signal that is independent of the first radio signal, for transmitting or receiving radio signals having orthogonal polarizations.
Claim 12
Dependent Claim
51 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 1, wherein the radio signals include a first radio signal and a second radio signal having a 90 degree phase difference from the first radio signal, for transmitting or receiving circularly polarized radio signals having orthogonal polarizations.
Claim 13
Dependent Claim
101 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 1, wherein the one or more bow tie assemblies (24; 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104; 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176; 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226; 304, 306, 308, 310, 312, 314, 316, 318, 320, 322, 324, 326; 404, 406, 408, 410, 412, 414, 416, 418, 420, 422, 424, 426; 500) further comprises a base (29) for mounting on the reflector plate (22, 152, 202, 302, 402).
Claim 14
Dependent Claim
42 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 12, wherein the base (29) has a 1/4λ dipole spacer shorting plate (72) connected to the U-shaped rectangular air-filled transmission feedline means (30, 32, 34; 50, 52, 54).
Claim 15
Dependent Claim
142 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 1, wherein the dual polarization antenna further comprises an RF isolation device (180; 230, 232; 328, 330; 430, 432, 434, 436; 510, 520) for coupling RF energy back to the pairs of cross dipoles (26, 28) forming the bow tie assemblies (24; 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104; 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176; 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226; 304, 306, 308, 310, 312, 314, 316, 318, 320, 322, 324, 326; 404, 406, 408, 410, 412, 414, 416, 418, 420, 422, 424, 426; 500), the RF energy being coupled having a phase and magnitude so as to cancel undesired RF energy coupled between dipoles (26, 28) of opposite polarization.
Claim 16
Dependent Claim
195 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 14, wherein the RF isolation device (180; 230, 232; 328, 330; 430, 432, 434, 436; 510, 520) includes either (1) one or more isolation trees (180, 230) or bars (232) arranged in relation to bow tie assemblies (154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176; 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226); (2) one or more isolation rails (328, 330) arranged alongside the one or more bow tie assemblies (304, 306, 308, 310, 312, 314, 316, 318, 320, 322, 324, 326; 404, 406, 408, 410, 412, 414, 416, 418, 420, 422, 424, 426; 500); (3) one or more small thin isolation rods or wires (430, 432, 434, 436) arranged in or on a radome (428) that covers the one or more bow tie assemblies (402, 404, 406, 408, 410, 412, 414, 416, 418, 420, 422, 424, 426); (4) one or more isolation strips (510, 520) coupled between positive and negative arms (502, 506; 504, 508) of a bow tie assembly (500); or (5) a combination of one or more of the above.
Claim 17
Dependent Claim
74 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 15, wherein the RF isolation device (180; 230, 232; 328, 330; 430, 432, 434, 436; 510, 520) includes an isolation tree (180; 230) having a top surface (182) with eight branches (184, 186, 188, 190, 192, 194, 196, 198) and having two legs (199a, 199b) connected to respective standoffs (199a, 199b) for supporting the same on the reflector plate (152).
Claim 18
Dependent Claim
69 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 15, wherein the RF isolation device (180; 230, 232; 328, 330; 430, 432, 434, 436; 510, 520) includes an isolation bar (232) having a flat top surface (234) and having two mounting standoff apertures (236, 238) for receiving two insulation standoffs (240) for supporting the same on the reflector plate (22, 152, 202, 302, 402).
Claim 19
Dependent Claim
78 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 15, wherein the dual polarization antenna (20) has twelve bow tie assemblies (204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226) arranged in a linear array, wherein the isolation bar (232) is positioned between a fourth and fifth bow tie assembly (218, 220), and wherein the isolation tree (230) is positioned between a seventh and eighth bow tie assembly (212, 214).
Claim 20
Dependent Claim
44 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 15, wherein the RF isolation device (180; 230, 232; 328, 330; 430, 432, 434, 436; 510, 520) includes a side isolation rail (328, 330) mounted of the reflector plate (302).
Claim 21
Dependent Claim
60 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 15, wherein the RF isolation device (180; 230, 232; 328, 330; 430, 432, 434, 436; 510, 520) includes one or more small thin isolation rods or wires (430, 432, 434, 436) embedded in or arranged on a radome (428) that covers the dual polarization antenna (400).
Claim 22
Dependent Claim
60 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 15, wherein the one or more small and thin isolation rods or wires (430, 432, 434, 436) are positioned at an angle of about 45 degrees between the one or more bow tie assemblies (404, 406, 408, 410, 412, 414, 416, 418, 420, 422, 424, 426).
Claim 23
Dependent Claim
60 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 15, wherein the one or more small and thin isolation rods or wires (430, 432, 434, 436) have a length in a range of about 55-75 millimeters that determines the magnitude of a return signal that cancels the undesirable RF energy of the respective opposite polarization.
Claim 24
Dependent Claim
66 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 22, wherein the one or more small and thin isolation rods or wires (430, 432, 434, 436) have a height in a range of about 2.5 to 4.0 inches above the ground plate that determines a phase of a return signal that cancels the undesirable RF energy of the respective opposite polarization.
Claim 25
Dependent Claim
95 words
A dual polarization antenna (20, 80, 150, 200, 300, 400, 500) according to claim 15, wherein the RF isolation device (180; 230, 232; 328, 330; 430, 432, 434, 436; 510, 520) includes means for coupling undesired RF energy having one or more isolation strips (510, 520), each having: an insulator (514, 524) connected between a first dipole arm (502, 508) and a second dipole arm (504, 506); and a thin strip of metal (512, 522) arranged on the insulator (514, 524) for coupling the first dipole arm (502, 508) and the second arm (504, 506).
Claim 26
Dependent Claim
131 words
A dual polarization antenna for transmitting or receiving polarized radio frequency signals, comprising: a reflector plate that is a ground plane and that reflects the polarized radio frequency signals; at least one cross dipole assembly, each having two cross dipoles with radiating arms for transmitting or receiving the polarized radio frequency signals at two polarizations, each cross dipole also having U-shape air-filled transmission feedline means for supporting respective radiating arms and for providing the polarized radio frequency signals between the reflector plate and said respective radiating arms; and an RF isolation device for coupling RF energy back to the pairs of cross dipoles forming the cross dipole assemblies, the RF energy being coupled having a phase and magnitude so as to cancel undesired RF energy coupled between dipoles of opposite polarization.
Claim 27
Dependent Claim
131 words
A dual polarization antenna for transmitting or receiving polarized radio frequency signals, comprising: a reflector plate that is a ground plane and that reflects the polarized radio frequency signals; at least one cross dipole assembly, each having two cross dipoles with radiating arms for transmitting or receiving the polarized radio frequency signals at two polarizations, each cross dipole also having U-shape air-filled transmission feedline means for supporting respective radiating arms and for providing the polarized radio frequency signals between the reflector plate and said respective radiating arms; and an RF isolation device for coupling RF energy back to the pairs of cross dipoles forming the cross dipole assemblies, the RF energy being coupled having a phase and magnitude so as to cancel undesired RF energy coupled between dipoles of opposite polarization.
Claim 28
Dependent Claim
76 words
A dual polarization antenna according to claim 25, wherein the RF isolation device includes either (1) one or more isolation trees or bars arranged in relation to cross dipole assemblies; (2) one or more isolation rails arranged alongside the one or more cross dipole assemblies; (3) one or more small thin isolation rods, wires or strips arranged in or on a radome that covers the one or more cross dipole assemblies; or (4) a combination thereof.
Claim 29
Dependent Claim
39 words
A dual polarization antenna according to claim 25, wherein the RF isolation device includes an isolation tree having a top surface with branches and having two legs connected to respective standoffs for supporting the same on the reflector plate.
Claim 30
Dependent Claim
43 words
A dual polarization antenna according to claim 25, wherein the RF isolation device includes an isolation bar having a flat top surface and having at least one mounting standoff apertures for receiving two insulation standoffs for supporting the same on the reflector plate.
Claim 31
Dependent Claim
51 words
A dual polarization antenna according to claim 25, wherein the dual polarization antenna has a multiplicity of cross dipole assemblies arranged in a linear array; and wherein the RF isolation device includes an isolation bar positioned between two cross dipole assemblies, and an isolation tree positioned between another cross dipole assemblies.
Claim 32
Dependent Claim
23 words
A dual polarization antenna according to claim 25, wherein the RF isolation device includes a side isolation rail mounted on the reflector plate.
Claim 33
Dependent Claim
37 words
A dual polarization antenna according to claim 25, wherein the RF isolation device includes one or more small thin isolation rods, wires or strips embedded in or arranged on a radome that covers the dual polarization antenna.
Claim 34
Dependent Claim
37 words
A dual polarization antenna according to claim 31, wherein the one or more small and thin isolation rods or wires are positioned at an angle of about 45 degrees between the one or more cross dipole assemblies.
Claim 35
Dependent Claim
49 words
A dual polarization antenna according to claim 31, wherein the one or more small and thin isolation rods or wires have a length in a range of about 55-75 millimeters that determines the magnitude of a return signal that cancels the undesirable RF energy of the respective opposite polarization.
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| 3.5 Years (Year 4) | 2003-02-21 | 2003-08-23 | 2004-02-22 | $2000.00 | Window Closed / Lapsed |
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