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1.发明公开公开(公告)号：US20230353258A1
公开(公告)日：2023-11-02
申请号：US17660846
申请日：2022-04-27
发明人： BING QIN LIM , CHERN YEE KOK , SIEW IM LOW , ALEXANDER OON , YEW HUI LIEW , MING YEH KOH
CPC分类号： H04B17/13 , H04B1/0458 , H04B17/12
摘要： A portable radio is provided that performs an impedance measurement to determine a radio frequency (RF) load type connected to an antenna port of the portable radio. The portable radio includes an impedance measurement circuit and a tunable matching circuit operatively coupled thereto through an RF switch A sweep generator injects an LMR frequency sweep to the RF load during non-transmit or non-receive time slots for the impedance measurement. The tunable matching circuit is configured as a radio frequency (RF) bypass during the impedance measurement, thereby enabling the impedance measurement circuit to directly measure the impedance of the RF load coupled to the RF port and identify the RF load as either a land mobile radio (LMR) antenna or equipment (wideband load). When the RF load is determined to be an LMR antenna, then the matching circuitry is tuned for the identified antenna. When the RF load is determined to be wideband equipment, then the matching circuitry remains bypassed.
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公开(公告)号：US20240283139A1
公开(公告)日：2024-08-22
申请号：US18172410
申请日：2023-02-22
发明人： MING YEH KOH , ALEXANDER OON , BING QIN LIM
摘要： A holster for docking a portable radio is provided. The holster is configured with a GND extension path that provides an antenna counterpoise for an external antenna of the portable radio. The holster is formed of a housing (121) having a belt attachment element (122) extending therefrom and a GND contact (124) integrated into therein, the a GND contact for coupling to a corresponding radio GND of the docked radio. The GND extension path extends from GND contact (124) through a first conductive element (126) of the holster housing to a second conductive element (128) embedded in the belt attachment element of the holster.
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公开(公告)号：US20190074594A1
公开(公告)日：2019-03-07
申请号：US16079117
申请日：2016-05-16
发明人： POH IMM GOH , TEIK YANG GOH , ALEXANDER OON , SEOW TENG WONG
摘要： An antenna is provided having a primary helical coil (102) and a secondary helical coil (104) contra-wound relative to the primary helical coil. Switchable coupling between the coils allows the antenna response to switch from lower to higher frequency responses within the same Ultra High Frequency (UHF) band. A bandwidth of the same physical length antenna can be increased up to twice the bandwidth or for a fixed bandwidth, the antenna length can be shortened. For the high frequency band, when the secondary helix is disconnected from the primary helix, the primary coil operates as a interferer notch out to improve interference rejection, to reject unwanted signals from nearby radios transmitting in frequencies separated by duplex spacing, such as Terrestrial Trunked Radio (TETRA) and cellular Global System for Mobile (GSM) communication bands.
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4.发明申请公开(公告)号：US20150029059A1
公开(公告)日：2015-01-29
申请号：US13948709
申请日：2013-07-23
发明人： OVADIA GROSSMAN , ANTONIO FARAONE , ALEXANDER OON , MARK ROZENTAL
CPC分类号： H01Q1/243 , H01Q1/244 , H01Q1/36 , H01Q7/00 , H01Q9/065 , H01Q9/30 , H01Q9/42 , Y10T29/49016
摘要： A short, efficient antenna utilizing a floating coax transmission line over ground or overlapping wire feed structure for reduced antenna size for use in handheld radios. An asymmetric transmission line radiator having a length (LTL) is oriented substantially planar to and proximal to a truncated ground plane, and having at one end an input/output connector, and at an other end a feed point at least one of above a ground plane and proximal to its edge. An exciter antenna in a form of a plate or bent wire is coupled to the feed point and is exterior to the edge of the ground plane and oriented substantially orthogonal to the ground plane, the exciter antenna having a larger dimension length (LEA) that is at least 50% smaller than the length LTL. The overall length of a perimeter of the antenna is approximately ½ a wavelength of a center frequency of the antenna.
摘要翻译： 一种短路，高效的天线，利用地面上的浮动同轴电缆传输线或重叠的馈线结构，以减少手持式无线电设备的天线尺寸。 具有长度（LTL）的非对称传输线辐射器被定向成基本上平坦于截短的接地平面并且靠近截顶的接地平面，并且在一端具有输入/输出连接器，并且在另一端具有至少一个地面 平面并靠近其边缘。 板或弯曲线形式的激励器天线耦合到馈电点，并且在接地平面的边缘的外部并且基本上垂直于接地平面定向，激励器天线具有较大的尺寸长度（LEA），其为 比长度LTL小至少50％。 天线的周长的总长度约为天线中心频率的1/2。
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