Multi-band receiving and transmitting separation device

Abstract

The utility model discloses a multi-band transmit-receive separation device which comprises an input channel, an output channel and a second duplexer. The input channel comprises an input port, a first radio frequency switch, a first duplexer and a first circulator; the output channel comprises an output port, a second radio frequency switch, a third duplexer and a second circulator. According to the utility model, the filter and the circulator are used for dual isolation, so that the isolation degree of a transmitting-receiving channel is improved, the receiving sensitivity is improved, and multi-band filtering and transmitting-receiving separation are realized.

Description

Technical Field

[0001] The utility model relates to signal transceiver separation, in particular to a multi-band transceiver separation device. Background Technique

[0002] For a non-homogeneous frequency half-duplex transceiver system, transceiver separation is an important index during system operation. If the transceiver separation of the system is not well solved, it will cause the receiving channel to be unable to work properly during transmission, and may even cause self-oscillation of the receiving channel. Under high-power conditions, it may even damage the front-end amplifier of the receiving channel.

[0003] At present, most of the research focuses on the transceiver separation of homogeneous frequency half-duplex systems, and methods such as adaptive cancellation technology are proposed to solve transceiver separation. In terms of engineering practice, for devices such as mobile phones, transceiver separation during system operation can be achieved by switching the transceiver switch in a half-duplex working mode. Currently, there is less research on multi-band half-duplex systems. This is mainly because when receiving different frequencies, isolation can be increased by adding filters to ensure the normal operation of the system. However, in a navigation communication device, due to the large transmission power of the system and the small received signal power, in the case of a large difference in signal power, simply adding filters may not be able to meet the requirements of transceiver separation of the system, and corresponding designs need to be done at this time.

[0004] To improve the isolation degree, a dual-antenna method with separate transceiver channels is often adopted. As long as the distance between the transceiver antennas is far enough and necessary wave absorption and shielding measures are taken, it is easy to solve the transceiver isolation problem. However, the volume, weight, and manufacturing cost increase significantly, which is not conducive to the miniaturization, light weight, and low-cost design of the system, restricting its application in the miniaturization field. Therefore, in the case of limited weight and volume, people still consider using a single-antenna mode. However, the transmitted signal in the single-antenna mode can directly leak into the receiving channel, deteriorating the receiver sensitivity, saturating the front end of the receiver, and even blocking it. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art, provide a multi-band transceiver separation device, improve the isolation degree of the transceiver channels, improve the receiving sensitivity, and achieve multi-band filtering and transceiver separation.

[0006] The purpose of the utility model is realized through the following technical solutions: A multi-band transceiver separation device includes an input channel, an output channel, and a second duplexer;

[0007] The input channel includes an input port, a first RF switch, a first duplexer, and a first circulator;

[0008] The output channel includes an output port, a second RF switch, a third duplexer, and a second circulator;

[0009] The first port of the second duplexer is connected to the first port of the first circulator, and the second port of the second duplexer is connected to the first port of the second circulator; the third port of the second duplexer is used to connect to the transceiver antenna.

[0010] The input end of the first RF switch is connected to the input port, and the output end of the first RF switch is connected to the third port of the first duplexer.

[0011] The input end of the second RF switch is connected to the third port of the third duplexer, and the output end of the second RF switch is connected to the output port.

[0012] The first port of the first duplexer is connected to the second port of the first circulator, and the second port of the first duplexer is connected to the second port of the second circulator.

[0013] The first port of the third duplexer is connected to the third port of the first circulator, and the second port of the third duplexer is connected to the second port of the second circulator.

[0014] The beneficial effects of the present utility model are as follows: The present utility model utilizes filters and circulators for double isolation, improves the isolation degree of the transceiver channels, improves the receiving sensitivity, and realizes multi-band filtering and transceiver separation. Description of the Drawings

[0015] Figure 1 is the principle block diagram of the present utility model;

[0016] Figure 2 is the schematic diagram of transmitting at port F1 and receiving at port F2;

[0017] Figure 3 is the schematic diagram of receiving at port F1 and transmitting at port F2;

[0018] Figure 4 is the schematic diagram of receiving at port F1 and port F2 simultaneously;

[0019] Figure 5 is the schematic diagram of transmitting at port F1 and port F2 simultaneously. Detailed Embodiment

[0020] The technical solution of the present utility model will be further described in detail below with reference to the drawings, but the protection scope of the present utility model is not limited to the following.

[0021] As Figure 1 shown, a multi-band transceiver separation device includes an input channel, an output channel, and a second duplexer (duplexer 2);

[0022] The input channel includes an input port, a first RF switch (RF switch 1), a first duplexer (duplexer 1), and a first circulator (circulator 1);

[0023] The output channel includes an output port, a second RF switch (RF switch 2), a third duplexer (duplexer 3), and a second circulator (circulator 3);

[0024] The first port of the second duplexer (F1 port of duplexer 2) is connected to the first port of the first circulator, and the second port of the second duplexer (F2 port of duplexer 2) is connected to the first port of the second circulator; the third port of the second duplexer is used to connect to the transceiver antenna;

[0025] The input end of the first RF switch is connected to the input port, and the output end of the first RF switch is connected to the third port of the first duplexer;

[0026] The input end of the second RF switch is connected to the third port of the third duplexer, and the output end of the second RF switch is connected to the output port;

[0027] The first port of the first duplexer (F1 port of duplexer 1) is connected to the second port of the first circulator, and the second port of the first duplexer (F2 port of duplexer 1) is connected to the second port of the second circulator;

[0028] The first port of the third duplexer (F1 port of duplexer 3) is connected to the third port of the first circulator, and the second port of the third duplexer (F2 port of duplexer 3) is connected to the second port of the second circulator.

[0029] In an embodiment of the present application, the input channel further includes a first amplifier, a first filter, a first coupler, and a first programmable attenuator disposed between the input port and the first RF switch. The input end of the amplifier is connected to the input port, and the output end of the amplifier is connected to the first RF switch through the first amplifier, the first filter, the first coupler, and the first programmable attenuator in sequence.

[0030] In an embodiment of the present application, the output channel further includes a second amplifier, a second filter, a second coupler, and a second programmable attenuator disposed between the second RF switch and the output port. The input end of the second amplifier is connected to the second RF switch, and the output end of the second amplifier is connected to the output port through the second filter, the second coupler, and the second programmable attenuator in sequence.

[0031] The working principle of the present application is as follows:

[0032] The duplexer is composed of two different band-pass filters. The first end of the first band-pass filter is connected to the F1 port (the first port), and the first end of the second band-pass filter is connected to the F2 port (the second port). The second ends of the two band-pass filters are simultaneously connected to the third port. Therefore, the frequencies allowed to pass through the F1 port and the F2 port are different, and only the in-band signals of the corresponding band-pass filters are allowed to pass through.

[0033] Among the first duplexer to the third duplexer, the passbands of the first band-pass filters are the same. Therefore, the frequencies allowed to pass through the F1 port in the first duplexer to the third duplexer are the same.

[0034] Among the first duplexer to the third duplexer, the passbands of the second band-pass filters are the same. Therefore, the frequencies allowed to pass through the F2 port in the first duplexer to the third duplexer are the same.

[0035] As Figure 2 shown, the F1 port transmits and the F2 port receives. The signal enters from the RF switch 1 and is transmitted to the F1 port of the duplexer 1. After frequency division and filtering, it is transmitted to the 2 port of the circulator 1 for transceiver separation, and then transmitted from the 1 port of the circulator 1 to the F1 port of the duplexer 2 and output. The signal is transmitted from the F2 port of the duplexer 2 to the 1 port of the circulator 2 for transceiver separation, and then transmitted from the 3 port of the circulator 2 to the F2 port of the duplexer 3 and then transmitted to the RF switch 2 for output. Frequency band filtering and cross-band transceiver separation are completed.

[0036] As Figure 3 shown, the F1 port receives and the F2 port transmits. The signal enters from the RF switch 1 and is transmitted to the F2 port of the duplexer 1. After frequency division and filtering, it is transmitted to the 2 port of the circulator 2 for transceiver separation, and then transmitted from the 1 port of the circulator 2 to the F2 port of the duplexer 2 and output. The signal is transmitted from the F1 port of the duplexer 2 to the 1 port of the circulator 1 for transceiver separation, and then transmitted from the 3 port of the circulator 1 to the F1 port of the duplexer 3 and then transmitted to the RF switch 2 for output. Frequency band filtering and cross-band transceiver separation are completed.

[0037] As Figure 4 shown, the F1 port and the F2 port receive simultaneously. The signal enters from the duplexer 2 and is transmitted through the F1 port for frequency division and filtering to the 1 port of the circulator 1 for transceiver separation, and then transmitted from the 3 port of the circulator 1 to the F1 port of the duplexer 3 and output after filtering through the RF switch 2. The signal enters from the duplexer 2, is transmitted through the F2 port for frequency division and filtering to the 1 port of the circulator 2 for transceiver separation, and then transmitted from the 3 port of the circulator 2 to the F2 port of the duplexer 3 and output after filtering through the RF switch 2. Two-way cross-band reception is achieved.

[0038] As Figure 5As shown, the F1 port and the F2 port transmit simultaneously. The signal enters from the RF switch 1 and is transmitted to the F1 port of the duplexer 1. After frequency division and filtering, it is transmitted to the port 2 of the circulator 1. After transmit-receive separation, it is transmitted from the port 1 of the circulator 1 to the F1 port of the duplexer 2 and output after filtering. The signal enters from the RF switch 1 and is transmitted to the F2 port of the duplexer 1. After frequency division and filtering, it is transmitted to the port 2 of the circulator 2. After transmit-receive separation, it is transmitted from the port 1 of the circulator 2 to the F2 port of the duplexer 2 and output after filtering. The transmission of two different frequency bands is realized.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the methods described in the foregoing embodiments. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for separating multi-band transceiver, characterized in that: It includes an input channel, an output channel and a second duplexer; The input channel includes an input port, a first RF switch, a first duplexer and a first circulator; The output channel includes an output port, a second RF switch, a third duplexer and a second circulator; The first port of the second duplexer is connected to the first port of the first circulator, and the second port of the second duplexer is connected to the first port of the second circulator; the third port of the second duplexer is used to connect to a transceiver antenna; The input end of the first RF switch is connected to the input port, and the output end of the first RF switch is connected to the third port of the first duplexer; The input end of the second RF switch is connected to the third port of the third duplexer, and the output end of the second RF switch is connected to the output port; The first port of the first duplexer is connected to the second port of the first circulator, and the second port of the first duplexer is connected to the second port of the second circulator; The first port of the third duplexer is connected to the third port of the first circulator, and the second port of the third duplexer is connected to the second port of the second circulator.

2. The multi-band transceiver separation device according to claim 1, characterized in that: The input channel further includes a first amplifier, a first filter, a first coupler and a first programmable attenuator arranged between the input port and the first RF switch. The input end of the amplifier is connected to the input port, and the output end of the amplifier is connected to the first RF switch through the first amplifier, the first filter, the first coupler and the first programmable attenuator in sequence.

3. The multi-band transceiver separation device according to claim 1, characterized in that: The output channel further includes a second amplifier, a second filter, a second coupler and a second programmable attenuator arranged between the second RF switch and the output port. The input end of the second amplifier is connected to the second RF switch, and the output end of the second amplifier is connected to the output port through the second filter, the second coupler and the second programmable attenuator in sequence.

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