Wide-band antenna

• US 10,439,289 B2
• Filed: 02/18/2016
• Issued: 10/08/2019
• Est. Priority Date: 02/19/2015
• Status: Active Grant

• Current Assignee: Galtronics USA Incorporated (Galtronics Limited)
• Original Assignee: Galtronics USA Incorporated (Galtronics Limited)
• Inventors: Ziv, Yaniv
• Primary Examiner(s): Levi, Dameon E
• Assistant Examiner(s): Hu, Jennifer F
• Application Number:
  US15/046,988
• Publication Number:
  US 20160248161A1
• Time in Patent Office: 1,328 Days
• CPC Class Codes: H01P 5/10 for coupling balanced lines or devices with unbalanced lines or devices
• CPC Class Codes: H01Q 21/062 using dipole aerials; H01Q21/067, H01Q21/068 take precedence
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 25/001 Crossed polarisation dual antennas orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161
• CPC Class Codes: H01Q 5/15 for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements
• CPC Class Codes: H01Q 5/364 Creating multiple current paths
• CPC Class Codes: H01Q 5/378 Combination of fed elements with parasitic elements
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/20 Two collinear substantially straight active elements; Substantially straight single active elements H01Q9/28 takes precedence
• CPC Class Codes: H01Q 9/26 with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength resonant loop antennas H01Q7/00

Abstract

A multiple-input multiple-output antenna is provided. The antenna may include, but is not limited to, at least one first dipole antenna including a first dipole arm, a second dipole arm, and a balun, the balun including a first bent conductive and a second bent conductive, and at least one second dipole antenna, the at least one second dipole antenna including a third dipole arm, a fourth dipole arm, a u-shaped balun galvantically coupled to the third dipole arm and the fourth dipole arm, a first conductive element galvanically isolated from the third dipole arm, the fourth dipole arm and the u-shaped balun, the first conductive element configured to capacitively couple to the third and fourth dipole arms, and a second conductive element galvanically connected to the u-shaped balun, the second conductive element configured to capacitively couple to the third dipole arm.

Claims

1. A multiple-input multiple-output antenna, comprising:

at least one first dipole antenna configured to radiate within a first frequency range, the at least one first dipole antenna comprising;

a first dipole arm,

a second dipole arm, and

a balun, the balun comprising;

a first bent conductive element galvanically connected to the first dipole arm, comprising;

a first lower conductive portion; and

a first upper conductive portion, the first lower conductive portion and the first upper conductive portion meeting at an angle, and

a second bent conductive element galvanically connected the second dipole arm and galvanically connected to the first bent conductive element, comprising;

a second lower conductive portion; and

a second upper conductive portion, the second lower conductive portion and the second upper conductive portion meeting at an angle, wherein at least one of the first upper conductive portion and the second upper conductive portion has an electrical length of ¼

λ

, where λ

is a wavelength of a resonant frequency within the frequency range of the at least one first dipole antenna, and

at least one second dipole antenna configured to radiate within a second frequency range, the second frequency range being different than the first frequency range, the at least one second dipole antenna comprising;

a third dipole arm,

a fourth dipole arm,

a u-shaped balun galvanically coupled to the third dipole arm and the fourth dipole arm,

a first conductive element galvanically isolated from the third dipole arm, the fourth dipole arm and the u-shaped balun, the first conductive element configured to capacitively couple to the third and fourth dipole arms, and

a second conductive element galvanically connected to the u-shaped balun, the second conductive element configured to capacitively couple to the third dipole arm.

2. The multiple-input multiple-output antenna of claim 1, further comprising a mounting surface, the at least one first dipole and the at least one second dipole being mounted to the mounting surface,

wherein a distance between the first and second dipole arms and the mounting surface is ¼

λ

.

3. The multiple-input multiple-output antenna of claim 2, wherein the first lower conductive portion and the second lower conductive portion have different lengths.

4. The multiple-input multiple-output antenna of claim 1, wherein the at least one first dipole further comprises:

a non-conductive cap, the non-conductive cap mechanically coupling the first dipole arm to the second dipole arm; and

a conductive cap mechanically coupled to the non-conductive cap, the non-conductive cap galvanically isolating the conductive cap from the first and second dipole arms, the conductive cap configured to capacitively couple to the first and second dipole arms.

5. The multiple-input multiple-output antenna of claim 1, wherein the at least one second dipole further comprises:

a isolative layer coupled to the u-shaped balun of the at least one second dipole; and

a conductive feed layer coupled to the isolative layer, the conductive feed layer galvanically connected to the third dipole arm.

6. The multiple-input multiple-output antenna of claim 1, wherein the second conductive element is substantially L-shaped, and comprises:

a first portion parallel to the third and fourth dipole arms galvanically connected to a bottom of the U-shaped balun; and

a second portion perpendicular to the third and fourth dipole arms galvanically coupled to the first portion.

7. The multiple-input multiple-output antenna of claim 6, wherein the second portion of the second conductive element is separated from the U-shaped balun by a distance of 9 millimeters.

8. The multiple-input multiple-output antenna of claim 6, wherein the second portion of the second conductive element is separated from the third dipole arm by a distance of 3 millimeters.

9. The multiple-input multiple-output antenna of claim 6, wherein the second portion of the second conductive element is separated from the U-shaped balun by a distance of 9 millimeters and the second portion of the second conductive element is separated from the third dipole arm by a distance of 3 millimeters.

10. A multiple-input multiple-output antenna, comprising:

at least one dipole antenna configured to radiate within a first frequency range, the at least one dipole antenna comprising;

a first dipole arm,

a second dipole arm, and

a balun, the balun comprising;

a first bent conductive element galvanically connected to the first dipole arm, comprising;

a first lower conductive portion; and

a first upper conductive portion, the first lower conductive portion and the first upper conductive portion meeting at an angle, and

a second bent conductive element galvanically connected the second dipole arm and galvanically connected to the first bent conductive element, comprising;

a second lower conductive portion; and

a second upper conductive portion, the second lower conductive portion and the second upper conductive portion meeting at an angle, wherein at least one of the first upper conductive portion and the second upper conductive portion has an electrical length of ¼

λ

, where λ

is a wavelength of a resonant frequency within the frequency range of the at least one first dipole antenna.

11. The multiple-input multiple-output antenna of claim 10, further comprising a mounting surface, the at least one dipole being mounted to the mounting surface,

wherein a distance between the first and second dipole arms and the mounting surface is ¼

λ

.

12. The multiple-input multiple-output antenna of claim 11, wherein the first lower conductive portion and the second lower conductive portion have different lengths.

13. The multiple-input multiple-output antenna of claim 10, wherein the at least one dipole further comprises:

a non-conductive cap, the non-conductive cap coupling the first dipole arm to the second dipole arm; and

a conductive cap coupled to the non-conductive cap, the non-conductive cap galvanically isolating the conductive cap from the first and second dipole arms, the conductive cap configured to capacitively couple to the first and second dipole arms.