CN-122003786-A - Broadband dual polarized antenna element and interleaved antenna array

Abstract

A multi-band antenna element is provided having a stacked pair of first and second low-band patch antenna elements and a high-band patch antenna element for operation on both low and high frequency bands. The L-shaped probe in the multi-band antenna is configured to parasitically excite the high-band patch antenna element. The linear slot in the second low-band patch antenna element is configured to resonate in the high-band.

Inventors

• P. Ramabadran
• S. KUMAR
• M von ctesvan

Assignees

• 高通股份有限公司

Dates

Publication Date

20260508

Application Date

20241008

Priority Date

20231019

Claims (20)

1. 1. A multi-band antenna element, the multi-band antenna element comprising: A ground plane; A first patch antenna element, the first patch antenna element being adjacent to the ground plane; a first L-shaped probe comprising a first via and a first feed, wherein the first via extends from the ground plane to the first feed, the first patch antenna element is positioned between the first feed and the ground plane, and a plane defined by the first feed is orthogonal to the first via; a second patch antenna element, wherein the first feed is positioned between the second patch antenna element and the first patch antenna element, and wherein the first L-shaped probe is configured to parasitically excite the second patch antenna element, and A third patch antenna element, the third patch antenna element including a first linear slot, wherein the second patch antenna element is positioned between the third patch antenna element and the first feed, the first patch antenna element is configured to parasitically excite the third patch antenna element, and the second patch antenna element is configured to parasitically excite the first linear slot.
2. 2. The multiband antenna element of claim 1, wherein the first patch antenna element is a first circular patch antenna element having a first diameter, the second patch antenna element is a second circular patch antenna element having a second diameter smaller than the first diameter, and the third patch antenna element is a third circular patch antenna element having a third diameter greater than the second diameter.
3. 3. The multiband antenna element of claim 2, wherein the first diameter is sized such that the first patch antenna element resonates at a first frequency within a low frequency band, and the third diameter is sized such that the third patch antenna element resonates at a second frequency within the low frequency band.
4. 4. A multi-band antenna element according to claim 3, wherein the second frequency within the low frequency band is lower than the first frequency within the low frequency band.
5. 5. A multi-band antenna element according to claim 3, wherein the second diameter of the second patch antenna element is sized such that the second patch antenna element resonates within a first frequency of a high frequency band, a lowest frequency of the high frequency band being higher than a highest frequency of the low frequency band.
6. 6. The multiband antenna element of claim 5, wherein a length of the first linear slot is sized such that the first linear slot resonates at a second frequency within the high frequency band.
7. 7. The multiband antenna element of claim 6, wherein the low frequency band is a low frequency band of FR2 and the high frequency band is a high frequency band of FR 2.
8. 8. The multiband antenna element of claim 6, wherein the first frequency of the low frequency band is about 27.5GHz and the second frequency of the low frequency band is about 25GHz.
9. 9. The multiband antenna element of claim 6, wherein the first frequency of the high-band is about 45GHz and the second frequency of the high-band is about 39GHz.
10. 10. The multiband antenna element of claim 1, further comprising: a second L-shaped probe including a second via and a second feed, wherein the second via extends from the ground plane to the second feed, and the second feed is located within the plane defined by the first feed.
11. 11. The multiband antenna element of claim 10, wherein the first L-shaped probe is positioned to parasitically excite the second patch antenna element according to a first linear polarization, and the second L-shaped probe is positioned to parasitically excite the second patch antenna element according to a second linear polarization.
12. 12. The multiband antenna element of claim 6, wherein the third patch antenna element further comprises a second linear slot positioned to intersect the first linear slot at a center of the third patch antenna element, and wherein the second linear slot is also sized to resonate at the second frequency within the high-band.
13. 13. The multiband antenna element of claim 12, wherein the second linear slot is aligned to intersect the first linear slot according to a right angle, and the third patch antenna element further comprises: a first stub extending orthogonally from a first end of the first linear slot; a second stub extending orthogonally from a second end of the first linear slot; A third stub extending orthogonally from the first end of the second linear slit, and A fourth stub extending orthogonally from the second end of the second linear slit.
14. 14. The multiband antenna element of claim 13, wherein the first stub is antisymmetric with respect to the second stub and the third stub is antisymmetric with respect to the fourth stub.
15. 15. The multiband antenna element of claim 1, further comprising: a second via extending from the ground plane to the first patch antenna element, and A third via extending from the ground plane to the first patch antenna element.
16. 16. The multiband antenna element of claim 15, wherein the second via is positioned to energize the first patch antenna element according to a first linear polarization and the third via is positioned to energize the first patch antenna element according to a second linear polarization.
17. 17. The multiband antenna element of claim 16, wherein the first linear polarization is orthogonal to the second linear polarization.
18. 18. The multiband antenna element of claim 1, wherein the ground plane is adjacent free space.
19. 19. The multiband antenna element of claim 1, further comprising: An air layer covering the third patch antenna element, and And a non-conductive protective film covering the air layer.
20. 20. A method of multi-band antenna operation, the multi-band antenna operation method comprising: exciting the first low-band patch antenna to resonate at a first frequency within the low-band; parasitically exciting a second low-band patch antenna to resonate at a second frequency within the low-band in response to the excitation of the first low-band patch antenna; exciting the L-shaped probe with a high frequency band signal; parasitically exciting a high-band patch antenna to resonate at a third frequency in a high-band in response to the excitation of the L-shaped probe, wherein a lowest frequency of the high-band is greater than a highest frequency of the low-band, and A slot in the second low-band patch antenna is parasitically excited to resonate at a fourth frequency within the high-band in response to the excitation of the L-shaped probe.

Description

Broadband dual polarized antenna element and interleaved antenna array Cross Reference to Related Applications The present application claims the priority and benefit of U.S. non-provisional patent application No. 18/490283 filed on day 10, month 19 of 2023, the entire contents of which are hereby incorporated by reference as if fully set forth below and for all applicable purposes. Technical Field The present disclosure relates generally to antennas and, more particularly, to wideband dual polarized antenna elements and interleaved antenna arrays. Background The use of patch antennas is a convenient and relatively low cost approach for millimeter wave applications. In a patch antenna, the electric field strength is greatest at the edges of the patch and zero at the center of the patch. The electric field lines between the ground plane and the radiating patch antenna will thus bend or bulge beyond the edges of the patch antenna to create what is denoted as a fringe field. Due to the fringe field, the effective size of the patch antenna is larger than just the actual patch size. Although patch antennas are convenient and relatively low cost antenna architectures, fringe field radiation from patch antennas can result in relatively narrow bandwidths. The narrow bandwidth of patch antennas can be problematic for use in wireless systems employed in millimeter-wavelength (mmW) spectrums, e.g., 24GHz to 48GHz for 5G NR high frequency bands (also referred to as FR 2), although higher frequencies may be used. Then, in order to cover the entire FR2 band using patch antennas, the use of multiple antenna arrays may be required, each of which is dedicated to a particular subset of the FR bandwidth, but this increases manufacturing costs and may require excessive space in the mobile device. Alternatively, interleaved patch antennas may be used on different substrate stacks, again increasing manufacturing costs. Disclosure of Invention The following summary discusses some aspects of the present disclosure to provide a basic understanding of the techniques discussed. This summary is not an extensive overview of all contemplated features of the disclosure, and is intended to neither identify key or critical elements of all aspects of the disclosure nor delineate the scope of any or all aspects of the disclosure. The sole purpose of this summary is to present some concepts of one or more aspects of the disclosure in a summarized form as a prelude to the more detailed description that is presented later. According to an aspect of the present disclosure, there is provided a multiband antenna element comprising a ground plane, a first patch antenna element adjacent to the ground plane, a first L-shaped probe comprising a first via and a first feed, wherein the first via extends from the ground plane to the first feed, the first patch antenna element is positioned between the first feed and the ground plane and a plane defined by the first feed is orthogonal to the first via, a second patch antenna element, wherein the first feed is positioned between the second patch antenna element and the first patch antenna element, and wherein the first L-shaped probe is configured to parasitically excite the second patch antenna element, and a third patch antenna element comprising a first linear slot, wherein the second patch antenna element is positioned between the third patch antenna element and the first feed, the first patch antenna element is configured to parasitically excite the third patch antenna element, and the second patch antenna element is configured to parasitically excite the first linear slot. According to another aspect of the present disclosure, there is provided a multi-band antenna operating method comprising exciting a first low-band patch antenna to resonate at a first frequency within a low-band, parasitically exciting a second low-band patch antenna to resonate at a second frequency within the low-band in response to the excitation of the first low-band patch antenna, exciting an L-shaped probe with a high-band signal, parasitically exciting a high-band patch antenna to resonate at a third frequency within the high-band in response to the excitation of the L-shaped probe, wherein a lowest frequency of the high-band is greater than a highest frequency of the low-band, and parasitically exciting a slot in the second low-band patch antenna to resonate at a fourth frequency within the high-band in response to the excitation of the L-shaped probe. According to yet another aspect of the present disclosure, there is provided a linear antenna array comprising a plurality of multi-band antenna elements, wherein each multi-band antenna element is configured to transmit and receive on a low frequency band and on a high frequency band, wherein a lowest frequency of the high frequency band is greater than a highest frequency of the low frequency band, and a plurality of high frequency band antenna elements, wherein each high