CN110912569A

CN110912569A - Ultrashort wave broadband transceiver

Info

Publication number: CN110912569A
Application number: CN201911267314.7A
Authority: CN
Inventors: 敬光君; 冯晓东
Original assignee: CHONGQING HUILING ELECTRON NEW TECHNOLOGY Co Ltd
Current assignee: Chongqing Huiling Electron New Technology Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-03-24
Anticipated expiration: 2039-12-11
Also published as: CN110912569B

Abstract

The invention discloses an ultrashort wave broadband transceiver. The ultra-short broadband transceiver comprises a receiving circuit and a transmitting circuit; the receiving circuit comprises a first filtering component, a first programmable attenuator, a first amplifier, a first filter, a first mixer, a second filter, a second amplifier, a second programmable attenuator, a second filtering component, an auxiliary gain circuit and a third amplifier which are electrically connected in sequence; the transmitting circuit comprises a third filtering component, a third programmable attenuator, a fourth amplifier, a fourth filter, a second frequency mixer, a fifth filter, a fifth amplifier and a first filtering component which are electrically connected in sequence. The ultrashort wave broadband transceiver has the advantages of good stability, low cost and strong anti-interference capability.

Description

Ultrashort wave broadband transceiver

Technical Field

The invention relates to the technical field of 500 MHz-2500 MHz radio frequency broadband transceiving, in particular to an ultrashort wave broadband transceiver.

Background

In the existing transceiver, two frequency conversion technologies are mostly adopted, and the bandwidth is narrow, usually from several hundred KHz to several MHz, and the following disadvantages mainly exist:

(1) by adopting a twice frequency conversion scheme, a first frequency mixing local oscillator and a second frequency mixing local oscillator are required to be provided, two local oscillator frequency sources are required for receiving and transmitting the same frequency point, four local oscillator frequency sources are required for receiving and transmitting the different frequency point, and an intermediate frequency filtering and amplifying circuit is arranged between the first frequency mixing and the second frequency mixing. The scheme is complex, the reliability is low, and the manufacturing cost is high;

(2) at present, the bandwidth of a large transceiver is narrow, usually from hundreds of KHz to several MHz, and the requirement of large data transmission cannot be met.

Disclosure of Invention

The invention aims to solve the technical problem of providing a transceiver which can carry out single frequency conversion and is suitable for a radio frequency broadband of 500 MHz-2500 MHz. To solve the above problems, the present invention provides an ultrashort wave broadband transceiver.

The invention relates to an ultrashort wave broadband transceiver, which comprises a receiving circuit and a transmitting circuit;

the receiving circuit comprises a first filtering component, a first programmable attenuator, a first amplifier, a first filter, a first mixer, a second filter, a second amplifier, a second programmable attenuator, a second filtering component, an auxiliary gain circuit and a third amplifier which are electrically connected in sequence;

the transmitting circuit comprises a third filtering component, a third programmable attenuator, a fourth amplifier, a fourth filter, a second frequency mixer, a fifth filter, a fifth amplifier and a first filtering component which are electrically connected in sequence.

Furthermore, the receiving circuit further comprises another second filtering component, and the second filtering component is electrically connected with the output end of the third amplifier.

Furthermore, the first filtering component comprises a shunt switch, at least two filters and a combiner switch, and the shunt switch is electrically connected with the combiner switch through the at least two filters.

Furthermore, the second filter component circuit comprises a shunt switch, four filters and a combiner switch, and the shunt switch is electrically connected with the combiner switch through the four filters.

Furthermore, the auxiliary gain circuit comprises a shunt switch, an amplifier and a combiner switch, wherein the shunt switch is electrically connected with the combiner switch, and the shunt switch is also electrically connected with the combiner switch through the amplifier.

Furthermore, the transmitting circuit further comprises an on-off switch, and the on-off switch is arranged between the fifth filter and the first filtering component.

Furthermore, the third filtering component comprises a shunt switch, two filters and a combiner switch, and the shunt switch is electrically connected with the combiner switch through the two filters.

The ultrashort wave broadband transceiver can stably receive and transmit ultrashort wave signals of 500-2500 MHz, the signals are subjected to one-time frequency conversion, the reliability is high, the cost is low, a receiving circuit and a transmitting circuit support various output bandwidths, the maximum bandwidth reaches 160MHz, the working bandwidth is large, and large data volume transmission can be supported.

Drawings

Fig. 1 is a circuit schematic of a receiving circuit.

Fig. 2 is a circuit schematic of a transmit circuit.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1 and 2, the preferred embodiment of the ultrashort wave broadband transceiver of the present invention includes a receiving circuit and a transmitting circuit; the receiving circuit is used for receiving 500 MHz-2500 MHz signals and converting the signals into 360MHz or 600MHz signals to be transmitted; the transmitting circuit is used for converting 4400MHz intermediate frequency input signals into 500 MHz-2500 MHz signals and transmitting the signals.

As shown in fig. 1, the receiving circuit includes a first filtering component 11, a first programmable attenuator 21, a first amplifier 31, a first filter 41, a first mixer 51, a second filter 42, a second amplifier 32, a second programmable attenuator 22, a second filtering component 12, an auxiliary gain circuit 6, a third amplifier 33, and a second filtering component 12, which are electrically connected in sequence. The first filtering component 11 is used for segmented filtering; the first programmable attenuator 21 adjusts the input signal amplitude; the first amplifier 31 amplifies the signal amplitude; the first filter 41 is used for filtering out image frequency and harmonic; the first mixer 51 is used for mixing to generate an intermediate frequency signal; the second filter 42 is used for filtering the intermediate frequency signal; the second amplifier 32 is used for amplifying the output amplitude of the intermediate frequency signal; the second programmable attenuator 22 is used for controlling the output amplitude of the intermediate frequency signal; the second filtering component 12 is used for generating intermediate frequency signals with multiple bandwidths; the auxiliary gain circuit 6 is used for compensating the intermediate frequency output signal amplitude, and the third amplifier 33 amplifies the intermediate frequency output signal amplitude; the second filter component 12 generates a multi-bandwidth intermediate frequency signal. The receiving circuit can stably receive 500-2500 MHz ultrashort wave signals, the ultrashort wave signals are subjected to primary frequency conversion and output on 360MHz and 600MHz intermediate frequencies, and the intermediate frequency output amplitude can be stably output in a required range; and can output both 40MHz and 160MHz signal bandwidths.

The first filtering component 11 includes a shunt switch 111, six filters 112, and a combiner switch 113, and the shunt switch 111 is electrically connected to the combiner switch 113 through the six filters 112. The six filters 112 divide 500 MHz-2500 MHz into six continuous but non-overlapping frequency bands, thereby improving the anti-interference capability of the receiver. The shunt switch 111 and the combiner switch 112 have the smallest loss in the working frequency band, and the noise coefficient of the receiver is optimized to improve the sensitivity. The shunt switch 111 and the combiner switch 112 are both single-pole multi-throw switches. In the present embodiment, the single-pole, six-throw switch is used, and in other embodiments, the single-pole, multiple-throw switch is used according to the number of filters provided.

The second filtering component 12 includes a shunt switch 121, four

filters

122, 123, 124, 125 and a combining switch 126, and the shunt switch 121 is electrically connected to the combining switch 126 through the four

filters

122, 123, 124, 125. The four

filters

122, 123, 124 and 125 are band-pass filters with working frequency of 360MHz and bandwidth of 40MHz, working frequency of 360MHz and bandwidth of 160MHz, working frequency of 600MHz and bandwidth of 40MHz, and working frequency of 600MHz and bandwidth of 160MHz, respectively. The shunt switch 121 and the combiner switch 126 are both single-pole multi-throw switches, which are single-pole four-throw switches in this embodiment.

The auxiliary gain circuit 6 includes a splitting switch 61, an amplifier 62 and a combining switch 63, the splitting switch 61 is electrically connected to the combining switch 63, and the splitting switch 61 is also electrically connected to the combining switch 63 through the amplifier 62. When the amplitude of the intermediate frequency output signal needs to be compensated, the intermediate frequency output signal is amplified by using an amplifier, namely, the shunting switch 61 transmits the signal to the combining switch 63 through the amplifier 62; if the intermediate frequency output signal amplitude does not need to be compensated, the shunt switch 61 directly transmits the signal to the switch of the combiner 61. The shunt switch 61 and the combiner switch 63 are both single-pole double-throw switches.

As shown in fig. 2, the transmitting circuit includes a third filtering component 13, a third programmable attenuator 23, a fourth amplifier 34, a fourth filter 44, a second mixer 52, a fifth filter 45, a fifth amplifier 35, an on-off switch, and a first filtering component 11, which are electrically connected in sequence. The third filtering component 13 is used for limiting the bandwidth of the intermediate frequency signal input; the third programmable attenuator 23 is configured to control an input amplitude of the intermediate frequency signal, the fourth amplifier 34 is configured to amplify the input amplitude of the intermediate frequency signal, and the fourth filter 44 is configured to filter out harmonics and clutter of the intermediate frequency input signal; the second mixer 52 is used for mixing to generate a transmission signal; the fifth filter 45 is configured to filter out an out-of-band spurious signal of the transmitted signal; the fifth amplifier 35 is used for amplifying the output amplitude of the transmission signal; the on-off switch is used for cutting off signal output when the signal does not need to be transmitted; the first filter component 11 is used for filtering various spurious segmented filter banks in the transmission signal. The transmitting circuit can stably transmit and output 500-2500 MHz ultrashort wave signals, the ultrashort wave signals are transmitted and output on 500-2500 MHz radio frequency through once frequency conversion, the radio frequency output amplitude can be stably output in a required range, and two signal bandwidths of 40MHz and 160MHz can be output.

The third filtering component 13 includes a branching switch 131, two

filters

132 and 133, and a combining switch 134, and the branching switch 134 is electrically connected to the combining switch 134 through the two

filters

132 and 133. The two

filters

132 and 133 respectively adopt bandpass filters with a working frequency point 4400MHz and a bandwidth of 40MHz, and with a working frequency point 4400MHz and a working frequency point of 160 MHz. The shunt switch 131 and the combiner switch 134 are both single-pole double-throw switches.

The receiving circuit and the transmitting circuit can stably receive and transmit 500-2500 MHz ultrashort wave signals; the received signals and the generated signals are subjected to frequency conversion only once, so that the complexity is small, the reliability is high, and the cost is low; and the receiving circuit and the transmitting circuit support various output bandwidths, the maximum bandwidth reaches 160MHz, the working bandwidth is large, and large data volume transmission can be supported.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields, and are within the scope of the present invention.

Claims

1. An ultrashort-wave broadband transceiver, comprising: comprises a receiving circuit and a transmitting circuit;

2. The ultrashort wave broadband transceiver of claim 1, wherein: the receiving circuit further comprises another second filtering component, and the second filtering component is electrically connected with the output end of the third amplifier.

3. The ultrashort wave broadband transceiver of claim 1, wherein: the first filtering assembly comprises a shunt switch, at least two filters and a combiner switch, and the shunt switch is electrically connected with the combiner switch through the at least two filters.

4. The ultrashort wave broadband transceiver of claim 1 or 2, wherein: the second filtering component circuit comprises a shunt switch, four filters and a combiner switch, wherein the shunt switch is electrically connected with the combiner switch through the four filters.

5. The ultrashort wave broadband transceiver of claim 1, wherein: the auxiliary gain circuit comprises a shunt switch, an amplifier and a combiner switch, wherein the shunt switch is electrically connected with the combiner switch, and the shunt switch is also electrically connected with the combiner switch through the amplifier.

6. The ultrashort wave broadband transceiver of claim 1, wherein: the transmitting circuit further comprises an on-off switch, and the on-off switch is arranged between the fifth filter and the first filtering component.

7. The ultrashort wave broadband transceiver of claim 1, wherein: the third filtering component comprises a shunt switch, two filters and a combiner switch, wherein the shunt switch is electrically connected with the combiner switch through the two filters.