-
公开(公告)号：US20190074594A1
公开(公告)日：2019-03-07
申请号：US16079117
申请日：2016-05-16
Applicant: MOTOROLA SOLUTIONS, INC
Inventor： POH IMM GOH , TEIK YANG GOH , ALEXANDER OON , SEOW TENG WONG
Abstract: 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.
-
公开(公告)号：US20160372824A1
公开(公告)日：2016-12-22
申请号：US14745161
申请日：2015-06-19
Applicant: MOTOROLA SOLUTIONS, INC
Inventor： CHIN KEONG, ALEXANDER OON , POH IMM GOH , TEIK YANG GOH , SEOW TENG WONG
CPC classification number: H01Q1/362 , H01Q1/1242 , H01Q1/125 , H01Q1/243 , H01Q3/24 , H01Q5/307 , H01Q5/357 , H01Q5/40 , H01Q7/08 , H01Q11/08 , H01Q11/083 , H01Q21/28
Abstract: An antenna (100) having an antenna structure is provided. The antenna structure is formed of a first section (102) and a second section (104). The first section is formed of a rolled conductive strip forming a helical coil having non-overlapping successive turns, and the second section (104) is formed of a wire spring coil having non-overlapping successive turns. The antenna (100) provides multi-band capability.
Abstract translation: 提供具有天线结构的天线（100）。 天线结构由第一部分（102）和第二部分（104）形成。 第一部分由形成具有非重叠连续匝的螺旋线圈的轧制导电条形成，并且第二部分（104）由具有不重叠连续匝的线弹簧线圈形成。 天线（100）提供多频带能力。
-
Search Results
2
records
(took 0.016 seconds)
