Expandable wireless transceiver
An expandable wireless transceiver is provided. The expandable wireless transceiver includes an antenna, a receiver, a transmitter and a switch connector. The antenna detects an electromagnetic signal in surrounding space and receives a signal with a first central frequency according to the detection result. The receiver receives the signal based on the detection result of the antenna. The transmitter outputs a radio-frequency signal. A third connection terminal of the switch connector provides a connective path to an expansion antenna. According to the coupling condition of the third connection terminal, the switch connector delivers the radio-frequency signal to its second connection terminal or third connection terminal. Thus, the radio-frequency signal with a second central frequency is transmitted to surrounding space through the antenna or the expansion antenna, wherein the second central frequency and the first central frequency are both in a specific band.
1. An expandable wireless transceiver, comprising:
an antenna, for detecting an electromagnetic signal from surrounding space and receiving a signal with a first central frequency according to the detection result;
a receiver, coupled to the antenna for receiving the signal delivered by the antenna;
a transmitter, for outputting a radio-frequency signal with a second central frequency; and
a switch connector, having a first connection terminal coupled to the transmitter, a second connection terminal coupled to the antenna and a third connection terminal, wherein the third connection terminal provides an connective path to an expansion antenna, and the first connected terminal delivers the radio-frequency signal with the second central frequency to the second connection terminal or the third connection terminal according to the coupling condition of the third connection terminal,
wherein the expandable wireless transceiver transmits the radio-frequency signal with the second central frequency to surrounding space through the antenna or the expansion antenna, and the second central frequency and the first central frequency are both in a specific band.
2. The expandable wireless transceiver according to claim 1 , wherein the switch connector comprises two metal conductive lines and a metal conductive plate, and a front end of one of the metal conductive lines has a metal spring,
wherein a first end of the first metal conductive line is coupled to the first connection terminal of the switch connector, a first end of the other metal conductive line is coupled to the second connection terminal of the switch connector and a second end of the other metal conductive line is coupled to a second end of the metal conductive line, and the metal conductive plate is coupled to a ground.
3. The expandable wireless transceiver according to claim 1 , wherein the third connection terminal is coupled to the expansion antenna, conversely, the first connection terminal is coupled to the second connection terminal.
4. The expandable wireless transceiver according to claim 1 , further comprising:
a coupler, having a first signal terminal coupled to the receiver, a second signal terminal coupled to the second connection terminal, and a third signal terminal coupled to the antenna, wherein the signal with the first central frequency received by the third signal terminal is coupled to the first signal terminal, and the radio-frequency signal with second central frequency received by the second signal terminal is coupled to the third signal terminal.
5. The expandable wireless transceiver according to claim 4 , wherein the coupler comprises a directional coupler, a wave separator or a coherent phase combiner.
6. The expandable wireless transceiver according to claim 4 , further comprising:
an blocking component, having a first terminal and a second terminal, wherein the first terminal is coupled to the second signal terminal of the coupler, and the second terminal is coupled to the second connection terminal of the switch connector for attenuating the radio-frequency signal with the second central frequency.
7. The expandable wireless transceiver according to claim 6 , wherein the blocking component comprises an isolator, an attenuator, a resistor, an inductor or a capacitor.
8. The expandable wireless transceiver according to claim 4 , further comprising:
a bandpass filter, coupled between the coupler and the receiver for filtering the radio-frequency signal with the second central frequency.
9. The expandable wireless transceiver according to claim 1 , further comprising:
an blocking component, having a first terminal and a second terminal, wherein the first terminal is coupled to the antenna, and the second terminal is coupled to the second connection terminal of the switch connector for attenuating the radio-frequency signal with the second central frequency.
10. The expandable wireless transceiver according to claim 9 , wherein the blocking component comprises an isolator, an attenuator, a resistor, an inductor or a capacitor.
11. The expandable wireless transceiver according to claim 9 , further comprising:
a bandpass filter, coupled between the antenna and the receiver for filtering the radio-frequency signal with the second central frequency.
12. The expandable wireless transceiver according to claim 1 , wherein the receiver comprises:
a bandpass filter, coupled to the antenna for filtering the radio-frequency signal with the second central frequency.
13. The expandable wireless transceiver according to claim 1 , wherein the specific band comprises one of the communication bands specified for frequency modulation wireless broadcast, Bluetooth system and global mobile communication system.