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    • 2. 发明授权
    • Dual frequency band antenna system
    • 双频天线系统
    • US5717409A
    • 1998-02-10
    • US691738
    • 1996-08-02
    • William J. GarnerIlya A. Korisch
    • William J. GarnerIlya A. Korisch
    • H01Q1/24H01Q5/00H01Q5/40
    • H01Q1/244H01Q5/40
    • A dual frequency band antennas system where the two frequency bands are not harmonically related includes first and second antenna sections. The first antenna section comprises a straight rod, with the length of the rod being at least one quarter wavelength at the center frequency of the lower of the two frequency bands. The second antenna section includes a straight portion terminated by a helical wire portion, with the total electrical length of the second antenna section being substantially equal to the length of the straight rod. A conductive antenna base is connected to at least one of the first and second antenna sections. A matching circuit coupled to the base is arranged to substantially cancel the reactive portion of the impedance of the connected antenna section for both frequency bands and to substantially equalize the resistive portion of the impedance of the connected antenna section to the resistive portion of the output impedance of the radio transceiver to which the antenna system is coupled. The lengths of the straight rod and of the second antenna section are such that together with the matching circuit the resistive portion of the impedance of the connected antenna section is substantially the same for both frequency bands.
    • 两个频带不是谐波相关的双频带天线系统包括第一和第二天线部分。 第一天线部分包括直杆,杆的长度在两个频带中较低的中心频率处至少四分之一波长。 第二天线部分包括由螺旋线部分终止的直线部分,第二天线部分的总电气长度基本上等于直杆的长度。 导电天线基座连接到第一和第二天线部分中的至少一个。 耦合到基座的匹配电路被布置成基本上消除了两个频带的连接的天线部分的阻抗的反应部分,并且将连接的天线部分的阻抗的电阻部分基本上均衡到输出阻抗的电阻部分 天线系统所耦合的无线电收发器。 直杆和第二天线部分的长度使得与匹配电路一起,连接的天线部分的阻抗的电阻部分对于两个频带基本相同。
    • 4. 发明授权
    • Portable telephone antenna
    • 便携式电话天线
    • US06484015B1
    • 2002-11-19
    • US08958455
    • 1997-10-27
    • Elizabeth AleinerIlya A. KorischYoshinao Nakada
    • Elizabeth AleinerIlya A. KorischYoshinao Nakada
    • H04B702
    • H04B7/0408H01Q1/242H04B7/08Y02D70/444
    • A portable telephone which includes a directional antenna is provided. The directional antenna is designed such that it can be positioned for use so that its beam is substantially parallel to the direction of received electromagnetic energy, thereby increasing the efficiency at which electromagnetic energy is transmitted to and received from the base station(s) as well as reducing the levels of electromagnetic energy transmitted into the body of the portable telephone user. In another embodiment, two directional antennas are provided for use with a diversity receiver and can be positioned for use to provide directional diversity, space diversity or both, thereby providing added immunity against fading.
    • 提供了包括定向天线的便携式电话机。 定向天线被设计成使得其可以被定位成使用,使得其波束基本上平行于接收的电磁能量的方向,从而提高电磁能量向基站传送和接收的效率,以及 作为减少传输到便携式电话用户身体的电磁能量的水平。 在另一个实施例中,提供两个定向天线以与分集接收机一起使用,并且可以将其定位成用于提供方向分集,空间分集或两者,从而提供增加的抵抗衰落的抗扰性。
    • 7. 发明授权
    • Fixed dual frequency band antenna
    • 固定双频天线
    • US5963170A
    • 1999-10-05
    • US861588
    • 1997-05-22
    • William J. GarnerIlya A. Korisch
    • William J. GarnerIlya A. Korisch
    • H01Q1/24H01Q5/00H01Q5/357H01Q5/50H01Q1/36
    • H01Q1/242H01Q5/357H01Q5/50
    • A fixed dual frequency band antenna for a dual frequency band radio transceiver where the two frequency bands are not harmonically related. The antenna includes a straight radiating antenna portion terminated by a helical wire radiating antenna portion, with the total electrical length of the antenna being approximately three quarters of the wavelength at the center frequency of the higher of the two frequency bands. A conductive radiating cap terminates the helical portion and a conductive antenna base is connected to the straight portion at the end opposite the helical portion. A matching circuit coupled between the base and the transceiver circuitry is arranged to substantially cancel the reactive portion of the impedance of the antenna for both frequency bands and to substantially equalize the resistive portion of the impedance of the antenna to the resistive portion of the output impedance of the radio transceiver. The length of the antenna is such that, together with the matching circuit, the resistive portion of the impedance of the antenna is substantially the same for both frequency bands.
    • 用于双频带无线电收发器的固定双频带天线,其中两个频带不是谐波相关的。 天线包括由螺旋线辐射天线部分端接的直的辐射天线部分,其中天线的总电气长度大约在两个频带中较高的中心频率处的波长的四分之三。 导电辐射帽终止螺旋部分,并且导电天线基座在与螺旋部分相对的端部处连接到直线部分。 耦合在基极和收发器电路之间的匹配电路被布置成基本上抵消了两个频带的天线的阻抗的反应部分,并且将天线的阻抗的电阻部分基本上均衡到输出阻抗的电阻部分 的无线电收发器。 天线的长度使得与匹配电路一起,天线的阻抗的电阻部分对于两个频带基本相同。