Broadband millimeter wave dual-channel receiver

Abstract

The utility model relates to the technical field of millimeter wave radio frequency communication, and discloses a broadband millimeter wave dual-channel receiver, which comprises two receiving links and a power divider, each receiving link is connected with the power divider, each receiving link comprises an isolator, a frequency mixer and an intermediate frequency amplifier which are sequentially connected from input to output, one input end of the frequency mixer is connected with a frequency multiplier, and the input end of the frequency multiplier is connected with one output end of the power divider; according to the utility model, mutual interference of multiple paths of signals in a test can be effectively prevented, two paths of millimeter wave radio frequency signals can be tested and analyzed at the same time, and the device can be used for various test scenes such as down-conversion test, two paths of radio frequency signal amplitude-phase consistency test, noise coefficient test and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of millimeter wave radio frequency communication, in particular to a broadband millimeter wave dual-channel receiver. Background Art

[0002] With the development of millimeter waves, millimeter waves have the characteristics of wide available bandwidth, large information capacity, good confidentiality and small size, and are widely used in the fields of communication, electronic countermeasures, radar and detection. In particular, the E band (60GHz-90GHz) has received extensive attention in communications in recent years. With the increase in application scenarios, testing in millimeter wave communications will inevitably become the key, especially radar testing, which obtains information such as environment, distance, and speed through the processing of transmitted and received signals.

[0003] Most of the existing millimeter-wave receivers are single-channel, with high loss and small bandwidth. There is a problem of mutual interference between multi-path signals during testing, and the application scenario is single. Therefore, we propose a dual-channel broadband millimeter-wave receiver to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a broadband millimeter wave dual-channel receiver which can effectively prevent the mutual interference of multiple signals in the test and can test and analyze two-channel millimeter wave radio frequency signals at the same time, and can be used for various test scenarios such as down-conversion test, two-channel radio frequency signal amplitude and phase consistency test, and noise coefficient test.

[0005] The utility model is achieved in this way:

[0006] A broadband millimeter wave dual-channel receiver includes two receiving links and a power divider, each of the receiving links is connected to the power divider, each receiving link includes an isolator, a mixer and an intermediate frequency amplifier connected in sequence from input to output, an input end of the mixer is connected to a frequency multiplier, and the input end of the frequency multiplier is connected to an output end of the power divider.

[0007] Furthermore, the frequency multiplier is a 6-fold frequency multiplier.

[0008] Furthermore, the mixer and the frequency multiplier are integrated into one.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] In practical applications, the input end of the power divider is used to input the local oscillator signal. The frequency range of the power divider is 6GHz-18GHz. The power divider divides the local oscillator signal at the input end into two, and transmits them to each receiving link's frequency multiplier for excitation; the frequency multiplier transmits the signal to the mixer. The input end of the isolator is a signal input end of the receiver, which is used to input the RF signal. The isolator transmits the input RF signal to the mixer unidirectionally, respectively at the first stage of each receiving link input end, to improve the input signal matching effect. The isolator loss is -0.5dB; the mixer uses the down-conversion principle (RF-LO=IF) to mix the two input high-frequency RF signals into low-frequency intermediate frequency signals for output. The mixer conversion loss is -10dB; the intermediate frequency amplifier amplifies the intermediate frequency signal for output. The output end of the intermediate frequency amplifier is the output end of the receiver. The intermediate frequency amplifier is a broadband low-noise amplifier covering a bandwidth of 30GHz, the intermediate frequency amplifier has a frequency range of 50kHz-30GHz and a gain of 30dB; the conversion gain of each receiving link is converted to 30-10-0.5=19.5dB; the receiver can be used for various test scenarios such as down-conversion test, two-way RF signal amplitude and phase consistency test, and noise figure test. The two receiving links have the same characteristics, low-frequency local oscillator input, broadband intermediate frequency output, and high conversion gain, which effectively prevents mutual interference of multiple signals during testing, and can test and analyze two-way millimeter-wave RF signals at the same time; the utility model effectively prevents mutual interference of multiple signals during testing, and can test and analyze two-way millimeter-wave RF signals at the same time, and can be used for various test scenarios such as down-conversion test, two-way RF signal amplitude and phase consistency test, and noise figure test. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the circuit structure of the utility model;

[0013] Figure 2 It is a conversion gain curve of a two-way conversion gain test using the utility model;

[0014] Figure 3 The utility model is used to perform a conversion gain curve of a two-channel signal broadband intermediate frequency response test.

[0015] Reference numerals: isolator 1; mixer 2; frequency multiplier 3; intermediate frequency amplifier 4; power divider 5. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0017] See also Figure 1 A broadband millimeter wave dual-channel receiver includes two receiving links and a power divider 5, each of the receiving links is connected to the power divider 5, each receiving link includes an isolator 1, a mixer 2 and an intermediate frequency amplifier 4 connected in sequence from input to output, an input end of the mixer 2 is connected to a multiplier 3, and an input end of the multiplier 3 is connected to an output end of the power divider 5.

[0018] In practical applications, the input end of the power divider 5 is used to input the local oscillator signal, and the frequency range of the power divider 5 is 6GHz-18GHz. The power divider 5 divides the local oscillator signal at the input end into two, and transmits them to the frequency multiplier 3 of each receiving link for excitation; the frequency multiplier 3 transmits the signal to the mixer 2, and the input end of the isolator 1 is a signal input end of the receiver, which is used to input the RF signal. The isolator 1 transmits the input RF signal to the mixer 2 unidirectionally, respectively at the first stage of each receiving link input end, to improve the input signal matching effect, and the loss of the isolator 1 is -0.5dB; the mixer 2 uses the down-conversion principle RF-LO=IF to mix the two input high-frequency RF signals into low-frequency intermediate frequency signals for output, and the conversion loss of the mixer 2 is -10dB; the intermediate frequency amplifier 4 amplifies the intermediate frequency signal for output, and the output end of the intermediate frequency amplifier 4 is the receiver. At the output end, the intermediate frequency amplifier 4 is a broadband low-noise amplifier covering a bandwidth of 30GHz. The frequency range of the intermediate frequency amplifier 4 is 50kHz-30GHz, and the gain is 30dB; the conversion gain of each receiving link is converted to 30-10-0.5=19.5dB; the receiver can be used for various test scenarios such as down-conversion test, two-way RF signal amplitude and phase consistency test, and noise coefficient test. The two receiving links have the same characteristics, low-frequency local oscillator input, broadband intermediate frequency output, and high conversion gain, which effectively prevents mutual interference of multiple signals during testing, and can test and analyze two millimeter-wave RF signals at the same time; the utility model effectively prevents mutual interference of multiple signals during testing, and can test and analyze two millimeter-wave RF signals at the same time, and can be used for various test scenarios such as down-conversion test, two-way RF signal amplitude and phase consistency test, and noise coefficient test.

[0019] See also Figure 1 , the frequency multiplier 3 is a 6-times frequency multiplier 3.

[0020] In this embodiment, the frequency multiplier 3 uses an E-band (60GHz-90GHz) full-bandwidth 6th frequency multiplier 3, and the local oscillator frequency signal is divided into two by the power divider 5 and output to the 6th frequency multiplier 3 to provide excitation, and the 6th frequency multiplier 3 outputs the LO signal to the mixer 2.

[0021] See also Figure 1 , the mixer 2 and the frequency multiplier 3 are integrated into one.

[0022] In this embodiment, the frequency multiplier 3 and the mixer 2 are integrated into one body, so as to reduce the volume of the receiver.

[0023] The working principle of the utility model is: when in use, two RF signals can be input simultaneously and sent to the receiver, and an additional local oscillator signal is provided. The power divider 5 divides the local oscillator signal into two and sends them to the six-fold frequency of two receiving links for excitation. The receiver uses the down-conversion principle (RF-LO=IF) to mix the two input high-frequency RF signals into low-frequency intermediate frequency signals for output, and then demodulates and analyzes the output intermediate frequency signals.

[0024] See also Figure 2 , using a fixed intermediate frequency = 100MHz (RF-LO = 100MHz), the conversion gain of the two channels of the broadband millimeter wave dual-channel receiver was tested. The conversion gain curve is shown in Figure 2 .

[0025] See also Figure 3 The intermediate frequency response (IF = 1 GHz to 30 GHz) of the broadband millimeter wave dual-channel receiver was tested. The conversion gain curve is shown in Figure 3 .

[0026] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A broadband millimeter wave dual-channel receiver, characterized in that: The invention comprises two receiving links and a power divider (5), each of the receiving links is connected to the power divider (5), and each of the receiving links comprises an isolator (1), a mixer (2) and an intermediate frequency amplifier (4) which are connected in sequence from input to output, an input end of the mixer (2) is connected to a frequency multiplier (3), and an input end of the frequency multiplier (3) is connected to an output end of the power divider (5).

2. A broadband millimeter wave dual-channel receiver according to claim 1, characterized in that: The frequency multiplier (3) is a 6-fold frequency multiplier.

3. A broadband millimeter wave dual-channel receiver according to claim 1, characterized in that: The mixer (2) and the frequency multiplier (3) are integrated into one.

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