FREQUENCY-SWITCHABLE ACTIVE ANTENNA SYSTEM AND CONTROL METHOD THEREOF
First Claim
1. An active antenna system, comprising:
- a printed circuit board having an antenna clearance region;
an antenna radiation element having a feed port, a first physical position and a second physical position;
a metal ground surface formed on a first layer of the printed circuit board and outside the antenna clearance region; and
a first switching circuit, wherein a first terminal of the first switching circuit is connected to the first physical position, a second terminal of the first switching circuit is connected to the second physical position, and a control terminal of the first switching circuit receives a first control signal, wherein the first physical position and the second physical position are selectively connected with each other or disconnected from each other according to the first control signal.
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Accused Products
Abstract
An active antenna system includes a printed circuit board, an antenna radiation element, a metal ground surface, and a first switching circuit. The printed circuit board has an antenna clearance region. The antenna radiation element has a feed port, a first physical position and a second physical position. The metal ground surface is formed on a first layer of the printed circuit board and outside the antenna clearance region. A first terminal of the first switching circuit is connected to the first physical position. A second terminal of the first switching circuit is connected to the second physical position. A control terminal of the first switching circuit receives a control signal. The first physical position and the second physical position are selectively connected with each other or disconnected from each other according to the control signal.
5 Citations
16 Claims
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1. An active antenna system, comprising:
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a printed circuit board having an antenna clearance region; an antenna radiation element having a feed port, a first physical position and a second physical position; a metal ground surface formed on a first layer of the printed circuit board and outside the antenna clearance region; and a first switching circuit, wherein a first terminal of the first switching circuit is connected to the first physical position, a second terminal of the first switching circuit is connected to the second physical position, and a control terminal of the first switching circuit receives a first control signal, wherein the first physical position and the second physical position are selectively connected with each other or disconnected from each other according to the first control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control method of an active antenna system, the active antenna system comprising an antenna radiation element and a first switching circuit, the antenna radiation element having a feed port, a first physical position and a second physical position, a first terminal of the first switching circuit being connected to the first physical position, a second terminal of the first switching circuit being connected to the second physical position, the control method comprising steps of:
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providing a control signal to the first switching circuit; if the first physical position and the second physical position are not connected with each other through the first switching circuit according to the control signal, the antenna radiation element resonating at a first resonant frequency; and if the first physical position and the second physical position are connected with each other through the first switching circuit according to the control signal, the antenna radiation element resonating at a second resonant frequency and a third resonant frequency, wherein the second resonant frequency and the third resonant frequency are higher than the first resonant frequency. - View Dependent Claims (11)
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12. An active antenna system, comprising:
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a printed circuit board having an antenna clearance region; an antenna radiation element comprising a feed port, a first physical position and a second physical position; a conductor connected to the first physical position; a metal ground surface formed on a first layer of the printed circuit board and outside the antenna clearance region; a parasitic element comprising a third physical position; and a switching circuit, wherein a first terminal of the switching circuit is connected to the third physical position, a second terminal of the switching circuit is connected to the second physical position, a third terminal of the switching circuit is connected to the metal ground surface, and a control terminal of the switching circuit receives a control signal, wherein according to the control signal, the third physical position and the second physical position are connected with each other through the switching circuit or the third physical position and the metal ground surface are connected with each other through the switching circuit. - View Dependent Claims (13, 14, 15, 16)
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Specification