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    • 1. 发明申请
    • CONTROLLABLE ANTENNA ARRANGEMENT
    • 可控天线布置
    • WO2004047220A1
    • 2004-06-03
    • PCT/EP2002/012985
    • 2002-11-20
    • NOKIA CORPORATIONSAGER, MadsTROELSEN, Jens
    • SAGER, MadsTROELSEN, Jens
    • H01Q1/24
    • H01Q1/243H01Q5/371H01Q5/378H01Q9/0421H01Q9/0442H01Q9/0457H01Q19/005
    • An antenna (11) includes a patch antenna element (22) capacitively coupled to a load patch (27). A switch (33) connects the load patch (27) to one of one or more strip lines (35, 37, 40), each of which has a different length. Each strip lines causes the load patch (27) to have a different impedance, with one causing a short circuit, one causing an open circuit, and one causing an impedance in between these extremes. Different impedances of the load patch (27) cause different frequencies of operation of the antenna patch (22) by virtue of the capacitive coupling therebetween. The antenna (11) is thereby tuneable to three separate frequencies. Other frequency bands are unaffected by virtue of the location of the load patch (27) relative to the antenna patch (22). By allowing tuning by way of controlling the impedance of the load patch (27), the antenna arrangement can be made smaller than a corresponding passive antenna operable at the same frequencies. By using an N throw switch, N strip lines of different lengths can be connected, each giving rise to a different operating frequency.
    • 天线(11)包括电容耦合到负载贴片(27)的贴片天线元件(22)。 开关(33)将负载贴片(27)连接到一个或多个带状线(35,37,40)中的一条,每条条线具有不同的长度。 每个带状线使得负载贴片(27)具有不同的阻抗,一个导致短路,一个导致开路,一个导致这些极限之间的阻抗。 通过其间的电容耦合,负载片(27)的不同阻抗导致天线片(22)的不同工作频率。 因此天线(11)可调谐到三个分开的频率。 凭借相对于天线贴片(22)的负载贴片(27)的位置,其他频带不受影响。 通过允许通过控制负载贴片(27)的阻抗来进行调谐,天线装置可以被制成小于在相同频率下操作的相应的无源天线。 通过使用N掷开关,可以连接不同长度的N条带状线,每条线产生不同的工作频率。