Vector network analyzer convenient to expand
By introducing a combination of components such as excitation sources, switches, and directional couplers into the vector network analyzer, port expansion and flexible switching are achieved, solving the problems of high port density and unusable ports after expansion, and improving connection reliability.
Patent Information
- Application Number
- CN202520266456.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing vector network analyzers have high port density, which makes the interfaces prone to damage during connection, and the ports cannot be used properly after the device is expanded.
It adopts a combined structure of excitation source, switch, directional coupler, measurement receiver and reference receiver in the chassis, and the port expansion is realized by switching. The external interface and the internal interface share the same panel.
Without adding hardware, the number of ports was expanded, improving connection flexibility and reliability, and preventing interface damage.
Smart Images
Figure CN223611616U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vector network analyzer technical field especially, it relates to a kind of vector network analyzer convenient for extension. BACKGROUND
[0002] Vector network analyzer is a kind of electromagnetic wave energy testing equipment, uses own signal source to measure the scattering parameter instrument of radio frequency microwave device, cable, joint etc., is often applied to microwave device, material science, electronic communication etc. Foundation industry and field research and development test and production.
[0003] With the development of technology, data transmission speed is faster and faster, high-speed data cable is composed of multiple high-speed differential cables, and the number of ports of the vector network analyzer is also required to be higher and higher, so sometimes the number of ports of the vector network analyzer needs to be expanded. To realize expansion, the circuit structure of the later-appeared vector network analyzer is as shown in Figure 2 For example, 2-port vector network analyzer, letters A-F represent 6 interface groups, each interface group includes two interfaces, for connection by "C" type rigid cable, which is usually called jumper, when the excitation source is to be output externally, the excitation source is directly jumpered and the external cable is connected, when the measurement receiver or reference receiver is to be connected to the outside, the measurement receiving jumper or reference receiving jumper is removed and connected from the outside. However, this kind of vector network analyzer still has some problems, including: each interface group and each port are located on the same panel, resulting in high line density and small spacing, when connecting the jumper, if the joint is not aligned or the two joints are not synchronized, the interface is easily damaged; after connecting the expansion device at C, D interface groups, the ports of the vector network analyzer itself cannot be normally used. UTILITY MODEL CONTENTS
[0004] In view of the above defects, the utility model provides a kind of vector network analyzer convenient for extension, it is realized in the port of self-brought while, still can carry out port extension.
[0005] In order to realize the purpose of the utility model, the following technologies are adopted:
[0006] A kind of vector network analyzer convenient for extension, including cabinet, be equipped with in cabinet:
[0007] Excitation source;
[0008] First switch, including input end connected with excitation source, and multiple output ends, part of output end is connected with external excitation interface;
[0009] Multiple directional couplers are respectively connected to another part of the output end of the first switch, and each directional coupler is further connected with a port;
[0010] a plurality of measurement receivers;
[0011] a plurality of reference receivers;
[0012] a plurality of second switches, the number of which is the sum of the number of measurement receivers and the number of reference receivers, the output end of the second switch being connected with the measurement receiver or the reference receiver, the second switch including two input ends, one of which is connected with the directional coupler, the other input end of the second switch connected with the measurement receiver being connected with the measurement receiving interface, and the other input end of the second switch connected with the reference receiver being connected with the reference receiving interface.
[0013] Further, the chassis includes a front panel and a rear panel, the external excitation interface being arranged on the rear panel, the port being arranged on the front panel, and the measurement receiving interface and the reference receiving interface both being arranged on the rear panel.
[0014] Further, the number of output ends of the first switch is 4, the number of external excitation interfaces is 2, and the number of directional couplers is 2.
[0015] Further, the number of measurement receivers and the number of reference receivers are both 2, and the number of second switches is 4, wherein the input ends of 2 second switches are connected with one directional coupler, and the input ends of the other 2 second switches are connected with the other directional coupler.
[0016] The technical scheme has the beneficial effects that:
[0017] Since the respective external excitation interfaces, reference receiving interfaces and measurement receiving interfaces arranged on the rear panel are switched by the internal switches, more port numbers can be expanded under the premise that the original ports are available, and the number of test ports is increased. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 A circuit principle diagram of an embodiment of the application is shown.
[0019] Figure 2 A circuit principle diagram of a vector network analyzer in the background art is shown. DETAILED DESCRIPTION
[0020] The technical scheme of the application will be described in further detail below with reference to the drawings.
[0021] As Figure 1 shown in a vector network analyzer convenient to expand, comprising a chassis, an excitation source, a first switch, a directional coupler, a measurement receiver, a reference receiver and a second switch.
[0022] The chassis includes a front panel and a rear panel. The excitation source, the first switch, the directional coupler, the measurement receiver, the reference receiver and the second switch are all arranged in the chassis.
[0023] The excitation source is an internal excitation source, i.e. an excitation signal generating device, which is usually referred to as a signal generator in existing products.
[0024] The first switch includes an input end connected with the excitation source and a plurality of output ends, some of which are connected with external excitation interfaces arranged on the rear panel.
[0025] The directional couplers are connected with the other output ends of the first switch, and each directional coupler is further connected with a port arranged on the front panel.
[0026] The measurement receivers are connected with the second switch, and each measurement receiver is arranged on the rear panel.
[0027] The reference receivers are connected with the second switch, and each reference receiver is arranged on the rear panel.
[0028] The second switch is connected with the measurement receivers and the reference receivers, and each second switch includes two input ends, one of which is connected with a directional coupler, and the other of which is connected with a measurement receiving interface or a reference receiving interface arranged on the rear panel.
[0029] In the embodiment, the number of output ends of the first switch is 4, the number of external excitation interfaces, directional couplers, measurement receivers and reference receivers is 2, and thus the number of second switches is 4, and the number of measurement receiving interfaces and reference receiving interfaces is 2. Figure 1 The second switches connected with the measurement receiver b1 and the reference receiver a1 are connected with one directional coupler, and the second switches connected with the measurement receiver b2 and the reference receiver a2 are connected with another directional coupler.
[0030] Working mode:
[0031] The first switch can be switched to select the ports on the front panel of the vector network analyzer or the external excitation interfaces on the rear panel, and the second switch can be switched to select the ports on the front panel or the measurement receiving interfaces or the reference receiving interfaces on the rear panel, so that the port expansion is realized, and the operation is flexible.
[0032] As another embodiment, the vector network analyzer is also commonly provided with 4 ports, and by analogy with the above example, the number of first switch output terminals is 8, the number of external excitation interfaces, directional couplers, measurement receivers and reference receivers is 4, and thus the number of second switches is 8, and the number of measurement receiving interfaces and reference receiving interfaces is 4. Each directional coupler is connected to a measurement receiver and a reference receiver respectively.
[0033] The above merely illustrates some embodiments of the present application and is not intended to limit the present application.
Claims
1. A vector network analyzer that facilitates extension, the vector network analyzer comprising: The application relates to a multi-channel signal source, which comprises a cabinet, wherein: a stimulating source is arranged in the cabinet; a first switch is arranged in the cabinet, which comprises an input end connected with the stimulating source and a plurality of output ends, some of which are connected with external stimulating interfaces; a plurality of directional couplers are arranged in the cabinet, which are respectively connected with the other output ends of the first switch, and each directional coupler is further connected with a port; a plurality of measuring receivers are arranged in the cabinet; a plurality of reference receivers are arranged in the cabinet; a plurality of second switches are arranged in the cabinet, the number of which is equal to the sum of the number of the measuring receivers and the number of the reference receivers, the output ends of the second switches are connected with the measuring receivers or the reference receivers, the second switches comprise two input ends, one of which is connected with the directional coupler, the other input end of the second switch connected with the measuring receivers is connected with a measuring receiving interface, and the other input end of the second switch connected with the reference receivers is connected with a reference receiving interface.
2. The vector network analyzer that facilitates expansion of claim 1, wherein, The cabinet comprises a front panel and a rear panel, the external stimulating interfaces are arranged on the rear panel, the ports are arranged on the front panel, and the measuring receiving interfaces and the reference receiving interfaces are arranged on the rear panel.
3. The vector network analyzer that facilitates expansion of claim 1, wherein, The number of the output ends of the first switch is 4, the number of the external stimulating interfaces is 2, and the number of the directional couplers is 2.
4. The vector network analyzer that facilitates expansion of claim 3, wherein, The number of the measuring receivers and the number of the reference receivers are both 2, and the number of the second switches is 4, wherein the input ends of two second switches are connected with one directional coupler, and the input ends of the other two second switches are connected with the other directional coupler.