A wideband receiving tester

Abstract

The utility model discloses a wide-band receiving tester, and the utility model relates to the field of electronic countermeasures. The wide-band receiving tester comprises an amplifier, a first filter, a first mixer, a second filter, a second mixer, an intermediate frequency amplifier, an intermediate frequency filter, a single-pole four-throw switch, an equalizer and a product ground; wherein the amplifier, the first filter, the first mixer, the second filter, the second mixer, the intermediate frequency amplifier and the intermediate frequency filter are electrically connected in sequence; the output end of the intermediate frequency amplifier is electrically connected to the input end of the single-pole four-throw switch, the single-pole four-throw switch is electrically connected to the equalizer, the equalizer is electrically connected to the product ground, and four equalizers are provided. The utility model can switch multiple equalizers, each of which has a different shape, and pairing switching is performed for different signal shapes, which can improve the unevenness of the signal, and the equalizer printed boards can be interchanged, and the portability is very high.

Description

Technical Field

[0001] The utility model relates to the field of electronic countermeasures, in particular to a wide-band receiving tester. Background Art

[0002] In the field of electronic countermeasures, the instantaneous bandwidth of components is usually relatively wide, and the components are required to have good performance indicators, including multi-channel amplitude consistency, phase consistency, etc. At the same time, the flatness requirements within the instantaneous bandwidth are relatively high. Commonly used RF frequency bands include 2~18GHz, 2~6GHz, 6~18GHz, 18~40GHz, etc., and the commonly used instantaneous bandwidth is 1GHz.

[0003] Due to the wide RF frequency band, the wide-band flatness of the device is not good. At the same time, due to the limited size of the product, filters with good flatness, such as cavity filters, LC filters, and dielectric filters, are too large and difficult to integrate. Comprehensively speaking, it is not easy to achieve very good flatness in each instantaneous frequency band. Therefore, we proposed a wide-band receiving tester to solve the above problems. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a wide-band receiving tester, which solves the problem that it is not easy to achieve very good flatness of each instantaneous frequency band.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a wide-band receiving tester, including an amplifier, a first filter, a first mixer, a second filter, a second mixer, an intermediate frequency amplifier, an intermediate frequency filter, a single-pole four-throw switch, an equalizer and a product ground;

[0006] wherein the amplifier, the first filter, the first mixer, the second filter, the second mixer, the intermediate frequency amplifier, and the intermediate frequency filter are electrically connected in sequence;

[0007] The output end of the intermediate frequency amplifier is electrically connected to the input end of the single-pole four-throw switch, the single-pole four-throw switch is electrically connected to the equalizer, and the equalizer is electrically connected to the product ground.

[0008] Preferably, four equalizers are provided, and the four equalizers are arranged side by side.

[0009] Preferably, the input ends of the four equalizers are electrically connected to the four output ends of the single-pole four-throw switch, respectively, and the input ends of the four equalizers are electrically connected to the input end of the product ground.

[0010] Beneficial Effects

[0011] The utility model provides a wide-band receiving tester. Compared with the prior art, it has the following beneficial effects:

[0012] The wideband receiving tester can be optimized through different equalizers according to the different flatness shapes of the signal, and after being equalized by different equalizers, the in-band unevenness of the original signal can be greatly improved, thereby being able to greatly improve the signal quality. For users, the signal processing capability is greatly improved, and the product competitiveness level is improved. Since the single-pole four-throw switch, four equalizers, and the product are independently designed printed circuit boards, if the in-band unevenness shapes of the product exceed 4 types, such as 6 types or more (this situation is relatively rare), the printed circuit board can be replaced. The switch on the printed circuit board can be replaced with a single-pole eight-throw switch, and the number of equalizer paths is 8. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of four types of shapes of the in-band unevenness of the utility model without equalizer;

[0015] Figure 3 It is a schematic diagram of the structure of four types of in-band unevenness of the equalizer used in the utility model.

[0016] In the figure: 1. amplifier; 2. first filter; 3. first mixer; 4. second filter; 5. second mixer; 6. intermediate frequency amplifier; 7. intermediate frequency filter; 8. single-pole four-throw switch; 9. equalizer; 10. product ground. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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 creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3The utility model provides a technical solution: a wide-band receiving tester, comprising an amplifier 1, a first filter 2, a first mixer 3, a second filter 4, a second mixer 5, an intermediate frequency amplifier 6, an intermediate frequency filter 7, a single-pole four-throw switch 8, an equalizer 9 and a product ground 10; wherein the amplifier 1, the first filter 2, the first mixer 3, the second filter 4, the second mixer 5, the intermediate frequency amplifier 6, and the intermediate frequency filter 7 are electrically connected in sequence, the output end of the intermediate frequency amplifier 6 is electrically connected to the input end of the single-pole four-throw switch 8, the single-pole four-throw switch 8 is electrically connected to the equalizer 9, the equalizer 9 is electrically connected to the product ground 10, four equalizers 9 are provided, and the four equalizers 9 are arranged side by side, the input ends of the four equalizers 9 are electrically connected to the four output ends of the single-pole four-throw switch 8, and the input ends of the four equalizers 9 are all electrically connected to the input end of the product ground 10;

[0019] The received signal can be preliminarily amplified by the amplifier 1, and then the amplified signal can be subjected to two filter and two-side mixer processing by the first filter 2, the first mixer 3, the second filter 4 and the second mixer 5, and the processed signal is sent to the intermediate frequency amplifier 6. The signal can be sent to the intermediate frequency filter 7 and the single-pole four-throw switch 8 by the intermediate frequency amplifier 6, and then can be switched to any equalizer 9 by the single-pole four-throw switch 8. When debugging the product, the flatness shape of the equalizer 9 can be debugged into four types, and the in-band unevenness shape of the product is divided into four types (shapes that are similar or not much different can be classified as one type). The equalizer is paired according to different in-band flatness shapes. If the equalizer 9 is not used, the in-band unevenness shape is classified into four types as follows Figure 2 As shown, f0 and f5 are the two ends of the in-band intermediate frequency bandwidth. The in-band f0~f5 is divided into four shapes at equal intervals, namely shape one with f1 as the highest point, shape two with f2 as the highest point, shape three with f3 as the highest point, and shape four with f4 as the highest point. In actual debugging, the product is classified according to the distance from the highest point of the shape to shape one to four, mainly for close distance. If the shape of equalizer 9 is used, it is just the opposite of the above figure, as shown below Figure 3 As shown, it just compensates for the shape of the product, making the final shape inside the belt close to flat;

[0020] Therefore, different equalizers 9 can be used to optimize the signal according to the different flatness shapes. After being equalized by different equalizers 9, the in-band unevenness of the original signal can be greatly improved, thereby greatly improving the signal quality. For users, the signal processing capability is greatly improved, and the product competitiveness level is improved. Since the single-pole four-throw switch 8, four equalizers 9, and product 10 are independently designed printed circuit boards, if the in-band unevenness shapes of the product exceed 4 types, such as 6 or more (this situation is relatively rare), the printed circuit board can be replaced. The switch on the printed circuit board can be replaced with a single-pole eight-throw switch, and the number of equalizer 9 channels is 8.

[0021] During operation, the received signal can be preliminarily amplified by the amplifier 1, and then the amplified signal can be subjected to two filter and two-side mixer processing by the first filter 2, the first mixer 3, the second filter 4 and the second mixer 5, and the processed signal is sent to the intermediate frequency amplifier 6. Through the intermediate frequency amplifier 6, the signal can be sent to the intermediate frequency filter 7 and the single-pole four-throw switch 8, and then can be switched to any equalizer 9 by the single-pole four-throw switch 8. When debugging the product, the flatness shape of the equalizer 9 can be debugged into four types, and the in-band unevenness shape of the product is divided into four types (shapes that are similar or not much different can be classified as one type). The equalizer is paired according to different in-band flatness shapes. If the equalizer 9 is not used, the in-band unevenness shape is classified into four types as follows Figure 2 As shown, f0 and f5 are the two ends of the in-band intermediate frequency bandwidth. The in-band f0~f5 is divided into four shapes at equal intervals, namely shape one with f1 as the highest point, shape two with f2 as the highest point, shape three with f3 as the highest point, and shape four with f4 as the highest point. In actual debugging, the product is classified according to the distance from the highest point of the shape to shape one to four, mainly for close distance. If the shape of equalizer 9 is used, it is just the opposite of the above figure, as shown below Figure 3 As shown, it just compensates for the shape of the product, making the final shape inside the belt close to flat;

[0022] Therefore, different equalizers 9 can be used to optimize the signal according to the different flatness shapes. After being equalized by different equalizers 9, the in-band unevenness of the original signal can be greatly improved, thereby greatly improving the signal quality. For users, the signal processing capability is greatly improved, and the product competitiveness level is improved. Since the single-pole four-throw switch 8, four equalizers 9, and product 10 are independently designed printed circuit boards, if the in-band unevenness shapes of the product exceed 4 types, such as 6 or more (this situation is relatively rare), the printed circuit board can be replaced. The switch on the printed circuit board can be replaced with a single-pole eight-throw switch, and the number of equalizer 9 channels is 8.

[0023] In summary, the device can switch multiple equalizers 9. Each equalizer 9 has a different shape. Paired switching is performed according to different signal shapes, which can improve the unevenness of the signal. The equalizer 9 printed circuit board is interchangeable and has high portability. Paired switching for different signal shapes is first debugged, and the different shapes of each frequency band of the product are classified, and then paired with the equalizer 9, and switched according to the frequency information. Because the frequency information of the product is known, for example, the 4GHz shape of the product can be classified as f1 type, then the product is switched to the f1 branch of the equalizer according to the 4GHz frequency information.

[0024] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A broadband receiving tester, characterized in that: It comprises an amplifier (1), a first filter (2), a first mixer (3), a second filter (4), a second mixer (5), an intermediate frequency amplifier (6), an intermediate frequency filter (7), a single-pole four-throw switch (8), an equalizer (9) and a product ground (10); The amplifier (1), the first filter (2), the first mixer (3), the second filter (4), the second mixer (5), the intermediate frequency amplifier (6), and the intermediate frequency filter (7) are electrically connected in sequence; The output end of the intermediate frequency amplifier (6) is electrically connected to the input end of the single-pole four-throw switch (8), the single-pole four-throw switch (8) is electrically connected to the equalizer (9), and the equalizer (9) is electrically connected to the product ground (10).

2. A broadband receiving tester according to claim 1, characterized in that: The equalizers (9) are provided in four numbers, and the four equalizers (9) are arranged side by side.

3. A broadband receiving tester according to claim 2, characterized in that: The input ends of the four equalizers (9) are electrically connected to the four output ends of the single-pole four-throw switch (8), respectively, and the input ends of the four equalizers (9) are electrically connected to the input end of the product ground (10).

Images