EP-4740271-A1 - PHASED ARRAY ANTENNA AND CALIBRATION BOARD FOR PHASED ARRAY ANTENNA

Abstract

The present invention provides a phased array antenna [100], comprising: a plurality of dual- polarized radiating elements [101], each integrated with a power divider [104], wherein the power divider [104] has a pre-determined amplitude and phase; and a plurality of antenna columns [106] arranged in a pre-defined pattern to improve cross-polarization Ratio (CPR), wherein the antenna columns [106] are separated by metallic walls [108] for port-to-port isolation and beam width improvement; and a calibration board [200] to calibrate the plurality of antenna columns [106].

Inventors

• Penta, Praveen
• VERMA, VIJAY
• GUPTA, SHUBHAM
• Maji, Meghla
• BHATNAGAR, AAYUSH
• BHATNAGAR, PRADEEP KUMAR

Assignees

• Jio Platforms Limited

Dates

Publication Date

20260513

Application Date

20240704

Claims (1)

1. We Claim: 1. A phased array antenna [100], comprising: ^ a plurality of dual-polarized radiating elements [101], each integrated with a power divider [104], wherein the power divider [104] has a pre-determined amplitude and phase; and ^ a plurality of antenna columns [106] arranged in a pre-defined pattern to improve cross- polarization Ratio (CPR), wherein the antenna columns [106] are separated by metallic walls [108] for port-to-port isolation and beam width improvement. 2. The phased array antenna [100] as claimed in claim 1, wherein the power divider [104] has a 1:4 design structure. 3. The phased array antenna [100] as claimed in claim 1, comprises at least a 4-radiating element antenna subarray design with the 1:4 power divider. 4. The phased array antenna [100] as claimed in claim 1, wherein the phased array antenna [100] is simulated with at least a radome design. 5. The phased array antenna [100] as claimed in claim 1, wherein the pre-defined pattern corresponds to a zigzag pattern. 6. The phased array antenna [100] as claimed in claim 1, comprises at least an 8x8 phased array antenna design. 7. The phased array antenna [100] as claimed in claim 1, comprises at least a 32T32R phased array antenna design. 8. The phased array antenna [100] as claimed in claim 1, comprises a calibration board [200] to calibrate the plurality of antenna columns [106], wherein the calibration board [200] comprises: ^ a 1:2 stripline based power divider [202]; ^ a power divider [204] with 32 ports comprising a first 1:16 power divider [204a] for a first polarization and a second 1:16 power divider [204b] for a second polarization; ^ a directional coupler [206] integrated with each port of the power divider; ^ stitching vias [208] across the stripline to prevent electromagnetic field leakage; and ^ a C-shaped shorting structure [210] to improve return loss performance.

Description

PHASED ARRAY ANTENNA AND CALIBRATION BOARD FOR PHASED ARRAY ANTENNA FIELD OF THE INVENTION [0001] The present invention generally relates to an antenna of a wireless communication system. In particular, the present invention relates to an architecture of a massive multiple-input- multiple-output (MIMO) antenna of a wireless communication system. BACKGROUND [0002] The following description of related art is intended to provide background information pertaining to the field of the invention. This section may include certain aspects of the art that may be related to various features of the present invention. However, it should be appreciated that this section be used only to enhance the understanding of the reader with respect to the present invention, and not as admissions of prior art. [0003] Currently, fifth generation (5G) communication technology is being deployed, promising faster data speeds, low latency, and the ability to connect multiple devices simultaneously. In these technologies, communication devices have started to utilize higher communication bands in order to support higher data-flow rates. A 5G Macro-Cell is a part of a radio access network (RAN) and provides radio coverage for a cellular network. It transmits and receives radio signals using a Massive multiple-input multiple-output (MIMO) antenna. The antenna design is based on various critical antenna parameters like Gain, Side-lobe levels (SLL), Cross-polarization Discrimination (XPD) in the entire vertical and horizontal steering range required to cover a sector of a macro cell. Currently available massive MIMO antennae have limitations of low cross-polarization discrimination (XPD) and lower sidelobe suppression levels over the entire horizontal and vertical beam steering ranges of the antennae. [0004] Thus, there is a requirement in the art for a massive MIMO antenna that has improved cross-polarization discrimination and higher lower sidelobe suppression levels over the entire horizontal and vertical beam steering ranges of the antenna. OBJECTS OF THE INVENTION [0005] Some of the objects of the present invention, which at least one embodiment disclosed herein satisfies are listed herein below. [0006] An object of the present invention is to provide a phased array antenna for massive multiple-input multiple-output (MIMO) applications that provide enhanced network coverage. [0007] Another object of the present invention is to provide a phased array antenna that exhibits improved cross-polarization discrimination over the entire horizontal and vertical beam steering ranges. [0008] Yet another object of the present invention is to provide a phased array antenna with improved sidelobe suppression levels over the entire horizontal and vertical beam steering ranges. SUMMARY OF THE INVENTION [0009] This section is provided to introduce certain implementations of the present invention in a simplified form that are further described below in the detailed description. This summary is not intended to identify the key features or the scope of the claimed subject matter. [0010] According to an aspect of the present invention, a phased array antenna is disclosed. The phased array antenna includes a plurality of dual-polarized radiating elements, each integrated with a power divider. The power divider has a pre-determined amplitude and phase. The phased array antenna includes a plurality of antenna columns arranged in a pre-defined pattern to improve cross- polarization Ratio (CPR). The antenna columns are separated by metallic walls for port-to-port isolation and beam width improvement. [0011] In an exemplary aspect, the power divider has a 1:4 design structure. [0012] In an exemplary aspect, the phased array antenna comprises at least 4-radiating elements subarray design with the 1:4 power divider. [0013] In an exemplary aspect, the phased array antenna is simulated with at least a radome design. [0014] In an exemplary aspect, the pre-defined pattern corresponds to a zigzag pattern. [0015] In an exemplary aspect, the phased array antenna includes at least an 8x8 phased array antenna design. [0016] In an exemplary aspect, the phased array antenna includes at least a 32T32R phased array antenna design. [0017] In an exemplary aspect, the phased array antenna includes a calibration board to calibrate the plurality of antenna columns. The calibration board includes a 1:2 stripline-based power divider, a power divider with 32 ports comprising a first 1:16 power divider for a first polarization and a second 1:16 power divider for a second polarization, a directional coupler integrated with each port of the power divider, stitching vias across the stripline to prevent electromagnetic field leakage, and a C-shaped shorting structure to improve return loss performance. BRIEF DESCRIPTION OF THE DRAWINGS [0018] The accompanying drawings, which are incorporated herein, and constitute a part of this invention, illustrate exemplary embodiments of the disclose