40dB/500KHz-2.5GHz RF bridge reflection bridge VSWR Network Analyzer

Description

40dB/500KHz-2.
5GHz RF bridge reflection bridge VSWR Network Analyzer
Description
Function:
This product is the highest version of the bridge in the store, the performance can kill a variety of 1-1000MHZ low frequency bridge, cost-effective! Please read the following text carefully for details.
The RF reflection bridge is mainly used for measuring the reflection characteristics of various RF devices (especially the antennas). It is a tool that is both economical and very good. The reflection bridge is the core of all RF vector network analyzers. . If you only have a spectrum analyzer (preferably with a tracking source) or a radio integrated tester or sweeper, as long as you match this baby, you have the most common function of the network analyzer (test standing wave ratio or see) Callback loss)! !
Suitable for a variety of radio enthusiasts, companies, universities and research institutes to measure passive device standing wave ratio, especially measuring antennas, debugging small signal amplifiers, filters, and so on. Can be well matched with RIGOL DSA815 spectrum analyzer, HP8590E, HP8591E, HP8560E, R3361A and other spectrum analysis and comprehensive measurement with tracking source! Because the output power of the instrument tracking source is generally adjustable, these instruments can be used to debug the input matching of various small-signal RF amplifiers after adding the bridge. It can truly measure the input matching of the circuit design of the small signal input state. Happening.
If you don't have a tracking source in your hand, you can use another independent RF signal source to achieve VSWR. It is a bit of a hassle. You can only test one frequency point and multiple tests every time you adjust the signal source and spectrum analyzer. After a few points, you can make a curve, you can still replace the sweep tracking source, haha!
This baby is especially suitable for debugging short-wave antennas, FM radio antennas, UV walkie-talkie antennas, 315MHZ, 433MHZ remote control antennas, mobile communication 800MHZ 900MHZ antennas, WIFI, Bluetooth 2.4GHZ antennas.
Baby indicator:
Operating frequency: 500KHZ to 2500MHZ (excessive operating frequency range)
Orientation: 40DB typical value (500KHZ to 30MHZ directionality 30dB,
Directivity 40dB from 30MHZ to 2000MHZ,
2000MHZ to 2500MHZ directionality 27dB)
Insertion loss: 13dB (RF input to reflection test port)
Port standing wave ratio: less than 1.3
Maximum input RF power: 20dBm
RF interface: All three ports are SMA female (external thread inner hole, gold small threaded head)
Although the outer casing is a plastic case, the inside has a good magnetic material shielding, even if the plastic case can well complete the shielding function, the bridge has no shielding performance defects, and the product itself is light and compact.
Ah Product wiring and how to use it
The wiring diagram is as follows. The left interface of the figure is connected to the spectrum analyzer tracking source when the RF signal input port is used.
The intermediate interface is the interface of the device under test. When connected, it is connected to the device under test.
The rightmost interface of the figure reflects the output port. When used, it is connected to the signal input port of the spectrum analyzer.
The following describes the process of testing a self-made 315 antenna using this bridge. First adjust the spectrum analyzer sweep frequency range, center frequency 315MHZ, bandwidth 100MHZ, instrument reference level -10DBM, then connect the bridge as shown below, the instrument display shows a horizontal line, the cursor point is 315MHZ, the point power is -14dBM .
Then connect the simple spring antenna that is wound by itself to the antenna port to be tested. The horizontal curve will show a concave point. The concave point is the actual working frequency of the antenna. If the pit is not the frequency you need, you need to re-adjust the antenna yourself. Let the concave point be the most concave at 315MHZ, the more concave the better! ! ! ! ! ! The power of the pit in the figure below is -42dBm. The return loss of the antenna made by itself is the difference between the two powers (42-14, which is 28dB, which is good for the actual antenna.) !!!)
On the basis of the above test results, the antenna is adjusted again, until the most concave power cursor point is obtained on 315MHZ, the more concave the better, we get the following curve after adjusting the antenna shape, the effect is better! ! The 315 small antenna shown in the figure has better callback loss than 30DB! ! ! ! ! In contrast, the callback loss of many 315 antennas on Taobao is less than 10DB, which seriously affects the communication effect, or the antenna that you make yourself, and the real-time debugging is true and reliable!
Bridge key indicator directional test
Orientation is the most critical indicator of a bridge. Our directional test is generally tested as follows. First connect the bridge. Press the diagram below to make the port under test empty (for 2.5 GHz or less, the no load is basically equal to the open and short circuit. The impact is small, the impact can be ignored) to get the following open curve.
Then keep the above link unchanged, connect the RF high-precision Load high-precision calibration piece, the whole curve will drop. At this time, it is considered that the bridge is a perfect matching load, and the following curve is obtained. The power of each frequency point in the lower graph is obtained. The difference between the power values of the corresponding frequency points of the open curve in the above figure is the directionality of the bridge at this frequency. The indicators of our bridge can be compared by two figures.。
Through the comparison test of the above two figures, it can be seen that the performance of this baby is strong (typical value, most of the orientation is up to 40DB), which can meet industrial and R&D applications. It can import HP/Agilent, Anli, and other finished bridges. It is extremely convenient for the need to verify the test antenna, make the antenna, and adjust the existing antenna. It’s also easy to make your own antennas, as long as there are instruments in minutes. . . . .
package:
1 X
NEW 40dB/500KHz-2.5GHz  RF bridge reflection bridge VSWR Network Analyzer
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