Huy C Cao

US Patent:

20070241983, Oct 18, 2007

Filed:

Apr 18, 2006

Appl. No.:

11/405814

Inventors:

Huy Cao - Dallas TX, US
Kevin Linehan - Rowlett TX, US
Martin Zimmerman - Chicago IL, US
Xiangyang Ai - Richardson TX, US

International Classification:

H01Q 21/26

US Classification:

343797000

Abstract:

A dipole antenna comprising a base; first and second pairs of dipoles positioned in front of the base and arranged around a central region; a first feed line which extends from the base towards the dipoles and splits at a first junction positioned in front of the base into a first pair of feed probes each of which is coupled to a respective one of the first pair of dipoles; and a second feed line which extends from the base towards the dipoles and splits at a second junction positioned in front of the base into a second pair of feed probes each of which is coupled to a respective one of the second pair of dipoles. The feed probes are spaced from the dipoles so as to field-couple with the dipoles. In one embodiment, the first pair of feed probes is positioned on a first side of the dipoles and the second pair of feed probes is positioned on a second side of the dipoles opposite to the first side. In another embodiment, the dipoles are printed on a PCB.

US Patent:

20110205119, Aug 25, 2011

Filed:

Nov 12, 2009

Appl. No.:

13/127592

Inventors:

Igor Timofeev - Dallas TX, US
Martin Zimmerman - Chicago IL, US
Huy Cao - Garland TX, US

International Classification:

H01Q 21/08
H01Q 1/24
H01Q 3/24
G01S 13/00

US Classification:

342373

Abstract:

A low sidelobe beam forming method and dual-beam antenna schematic are disclosed, which may preferably be used for 3-sector and 6-sector cellular communication system. Complete antenna combines 2-, 3- or -4 columns dual-beam sub-arrays (modules) with improved beam-forming network (BFN). The modules may be used as part of an array, or as an independent 2-beam antenna. By integrating different types of modules to form a complete array, the present invention provides an improved dual-beam antenna with improved azimuth sidelobe suppression in a wide frequency band of operation, with improved coverage of a desired cellular sector and with less interference being created with other cells. Advantageously, a better cell efficiency is realized with up to 95% of the radiated power being directed in a desired cellular sector.

US Patent:

20230018326, Jan 19, 2023

Filed:

Sep 26, 2022

Appl. No.:

17/952521

Inventors:

- Hickory NC, US
Martin L. Zimmerman - Chicago IL, US
Huy Cao - Garland TX, US
Yanping Hua - Suzhou, CN

International Classification:

H01Q 3/26
H01Q 3/30
H01Q 25/00
H01Q 1/24

Abstract:

A low sidelobe beam forming method and dual-beam antenna schematic are disclosed, which may preferably be used for 3-sector and 6-sector cellular communication system. Complete antenna combines 2-, 3- or -4 columns dual-beam sub-arrays (modules) with improved beam-forming network (BFN). The modules may be used as part of an array, or as an independent 2-beam antenna. By integrating different types of modules to form a complete array, the present invention provides an improved dual-beam antenna with improved azimuth sidelobe suppression in a wide frequency band of operation, with improved coverage of a desired cellular sector and with less interference being created with other cells. Advantageously, a better cell efficiency is realized with up to 95% of the radiated power being directed in a desired cellular sector.

US Patent:

20200381821, Dec 3, 2020

Filed:

Aug 20, 2020

Appl. No.:

16/998558

Inventors:

- Hickory NC, US
Martin L. Zimmerman - Chicago IL, US
Huy Cao - Garland TX, US
Yanping Hua - Suzhou, CN

International Classification:

H01Q 3/26
H01Q 3/30
H01Q 25/00
H01Q 1/24

Abstract:

A low sidelobe beam forming method and dual-beam antenna schematic are disclosed, which may preferably be used for 3-sector and 6-sector cellular communication system. Complete antenna combines 2-, 3- or -4 columns dual-beam sub-arrays (modules) with improved beam-forming network (BFN). The modules may be used as part of an array, or as an independent 2-beam antenna. By integrating different types of modules to form a complete array, the present invention provides an improved dual-beam antenna with improved azimuth sidelobe suppression in a wide frequency band of operation, with improved coverage of a desired cellular sector and with less interference being created with other cells. Advantageously, a better cell efficiency is realized with up to 95% of the radiated power being directed in a desired cellular sector.

US Patent:

20180062258, Mar 1, 2018

Filed:

Oct 19, 2017

Appl. No.:

15/787782

Inventors:

- Hickory NC, US
Martin L. Zimmerman - Chicago IL, US
Huy Cao - Garland TX, US
Yanping Hua - Jiangsu, CN

International Classification:

H01Q 3/26
H01Q 1/24
H01Q 3/30
H01Q 25/00
H01Q 3/40
H01Q 3/28
H01Q 21/24
H01Q 25/02
H01Q 21/06

Abstract:

A low sidelobe beam forming method and dual-beam antenna schematic are disclosed, which may preferably be used for 3-sector and 6-sector cellular communication system. Complete antenna combines 2-, 3- or -4 columns dual-beam sub-arrays (modules) with improved beam-forming network (BFN). The modules may be used as part of an array, or as an independent 2-beam antenna. By integrating different types of modules to form a complete array, the present invention provides an improved dual-beam antenna with improved azimuth sidelobe suppression in a wide frequency band of operation, with improved coverage of a desired cellular sector and with less interference being created with other cells. Advantageously, a better cell efficiency is realized with up to 95% of the radiated power being directed in a desired cellular sector.