Invention Grant
US07839351B2 Antenna system and method to transmit cross-polarized signals from a common radiator with low mutual coupling
有权
从具有低互耦的公共散热器传输交叉极化信号的天线系统和方法
- Patent Title: Antenna system and method to transmit cross-polarized signals from a common radiator with low mutual coupling
- Patent Title (中): 从具有低互耦的公共散热器传输交叉极化信号的天线系统和方法
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Application No.: US11698065Application Date: 2007-01-26
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Publication No.: US07839351B2Publication Date: 2010-11-23
- Inventor: John L. Schadler , Andre Skalina , Richard I. Bibber , Jeffrey M. Brown
- Applicant: John L. Schadler , Andre Skalina , Richard I. Bibber , Jeffrey M. Brown
- Applicant Address: US NC Charlotte
- Assignee: SPX Corporation
- Current Assignee: SPX Corporation
- Current Assignee Address: US NC Charlotte
- Agency: Baker & Hostetler LLP
- Main IPC: H01Q1/12
- IPC: H01Q1/12 ; H01Q11/12 ; H01Q21/26

Abstract:
A dual-port IBOC® antenna provides omnidirectional radiation of orthogonal, circularly polarized analog (FM) and digital (OFDM) signals using quadruple coplanar square loops driven from a hybrid having balanced outputs. The loops are arranged in a tiled square, with proximal sides functioning as further stripline hybrids to cancel cross coupling between the loops. Each loop quad is reflector-backed and emits a directional signal; multiple loop quads oriented radially form an omni bay. Vertical spacing between bays includes a minimum position for mutual coupling, while symmetry establishes uniform input impedance on the hybrid input ports. Tuning barbs on the loops fine tune frequency response. Bandwidth is wide, so that a single antenna can radiate multiple FM analog and hybrid IBOC® channels over the VHF FM radio broadcast band.
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