CN104422823A - Electronically scanned array radar phase difference measuring device - Google Patents
Electronically scanned array radar phase difference measuring device Download PDFInfo
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- CN104422823A CN104422823A CN201310401183.3A CN201310401183A CN104422823A CN 104422823 A CN104422823 A CN 104422823A CN 201310401183 A CN201310401183 A CN 201310401183A CN 104422823 A CN104422823 A CN 104422823A
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- phase difference
- measuring device
- difference measuring
- electronically scanned
- array radar
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Abstract
The invention discloses an electronically scanned array radar phase difference measuring device. The device comprises an analog-digital converter and a clock chip, wherein the analog-digital converter is connected with an output end of a phase difference measuring chip and is connected with a buffer device; the buffer device is connected with an interface chip; the clock chip is connected with the interface chip, the analog-digital converter and the buffer device. By using the electronically scanned array radar phase difference measuring device, the frequency of a measured signal can reach up to 2.7 GHz, and the phase measuring accuracy is smaller than 0.5 degree. The phase difference between two radio frequency (RF) or intermediate frequency (IF) signals can be independently measured; the device can be applied to a global system for mobile communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (W-CDMA) and Time Division Multiple Access (TDMA) cellular phones, personal communication service (PCS), a broadband infrastructure network and a modern phased array system.
Description
Technical field
The invention belongs to network communication field, relate to a kind of Electronically Scanned Array radar phase difference measuring device.
Background technology
Phased-array radar (Phased Array Radar) is i.e. Electronically Scanned Array radar (active electronically scanned array, AESA), refer to a class by change antenna surface array send the synthesis mode of wave beam, change the radar of beam scanning direction.This design is different from the radar antenna of mechanical scanning, can reduce or avoid using mechanical motor to drive radar antenna just can reach the object containing larger reconnaissance range completely.The electron scanning mode of current use comprises the mode changing frequency or change phase place, is changed in the direction of the beam transmission of synthesis.It is high that the advantage of electron scanning comprises sweep speed, and the speed changing beam direction is fast, and the degree of accuracy measured for target signal, higher than mechanical scanning radar, removes the contingent fault of mechanical scanning radar antenna driving device from simultaneously.
In real work, often can run into the phase differential needing detection two signals, this is also indispensable importance in research network phase-frequency characteristic.In recent years, along with the digit synthesis participated in computing machine and usage data sample solve the appearance of third generation Auto-Test System that measurement characteristics is feature and virtual instrument, propose and use synchronous real time sample technology to obtain sampling sequence, thus calculate the method for the phase differential between two signals.Although these methods are all no longer dependent on standard timing signal, and directly can obtain measured signal phase place by sampled point through numerical value process, but the frequency of its measured signal is all very low, the highest also only have tens KHz, and calculation of complex, operand are large, the requirement of modern phased-array technique can not be met far away.
Summary of the invention
For solving the technological deficiency that prior art measured signal frequency is low, calculation of complex, operand are large, the invention discloses a kind of Electronically Scanned Array radar phase difference measuring device.
Electronically Scanned Array radar phase difference measuring device, it is characterized in that, comprise phase difference measurement chip, the analog to digital converter be connected with phase difference measurement chip output, described analog to digital converter is connected with buffer storage, and described buffer storage is connected with interface chip; Described Electronically Scanned Array radar phase difference measuring device also comprises the clock chip be connected with interface chip, analog to digital converter and buffer storage.
Preferably, described buffer storage is FIFO buffer memory.
Preferably, described phase difference measurement chip is AD8302.
Preferably, described analog to digital converter is AD7865.
Preferably, described interface chip is S5933.
Preferably, more than one of described phase measurement number of chips, output terminal is all connected with analog to digital converter, and described analog to digital converter is multichannel analog to digital converter.
Preferably, described clock chip is DS1302.
Adopt Electronically Scanned Array radar phase difference measuring device of the present invention, the frequency of measured signal can up to 2.7GHz, and phase measurement accuracy is less than 0.5 degree.Independently can measure the phase differential between two radio frequencies (RF) or intermediate frequency (IF) signal, global system for mobile communications (GSM), CDMA (CDMA), Wideband Code Division Multiple Access (WCDMA) (W-CDMA), time division multiple access (TDMA) (TDMA) cell phone, Personal Communications Services (PCS), broadband infrastructure network and modern phased array system can be applied to.
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram of a kind of embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Electronically Scanned Array radar phase difference measuring device, it is characterized in that, comprise phase difference measurement chip, the analog to digital converter be connected with phase difference measurement chip output, described analog to digital converter is connected with buffer storage, and described buffer storage is connected with interface chip; Described Electronically Scanned Array radar phase difference measuring device also comprises the clock chip be connected with interface chip, analog to digital converter and buffer storage.
Fig. 1 provides the present invention's embodiment, and be made up of a few part such as phase difference measurement chip AD8302,4 passage A/D conversion chip AD7865, programmable logic device (PLD) EPM7256, pci interface chip S5933, clock chip is DS1302.Wherein core is the realization of phase difference measurement chip AD8302,4 passage A/D conversion chip AD7865 and pci interface chip.System Working Principle: give phase difference measurement chip AD8302 by the signal needing to measure and reference signal thereof, AD8302 is by phase difference output signal VPHS, the VPHS signal of slow change gives the A/D conversion chip AD7865 of 14,4 passage after differential amplification, data write in FIFO by AD7865 under the control of programmable logic device (PLD), FIFO is under the control of programmable logic device (PLD), realized by pci interface chip S5933 and exchanges data between pci interface, then complete final phase difference measurement by phase difference measurement algorithm.The key component affecting whole system performance is phase difference measuring circuit, and the core devices of phase difference measuring circuit is phase difference measurement chip AD8302.AD8302 is the monolithic integrated optical circuit of ADI company for RF/IF phase difference measurement, it to measure from low frequency to two input signals in 2.7GHz frequency range simultaneously phase differential.It has measurement, controller and level comparator three kinds of working methods.
Adopt Electronically Scanned Array radar phase difference measuring device of the present invention, the frequency of measured signal can up to 2.7GHz, and phase measurement accuracy is less than 0.5 degree.Independently can measure the phase differential between two radio frequencies (RF) or intermediate frequency (IF) signal, global system for mobile communications (GSM), CDMA (CDMA), Wideband Code Division Multiple Access (WCDMA) (W-CDMA), time division multiple access (TDMA) (TDMA) cell phone, Personal Communications Services (PCS), broadband infrastructure network and modern phased array system can be applied to.
Previously described is each preferred embodiment of the present invention, preferred implementation in each preferred embodiment is if not obviously contradictory or premised on a certain preferred implementation, each preferred implementation can stack combinations use arbitrarily, design parameter in described embodiment and embodiment is only the invention proof procedure in order to clear statement inventor, and be not used to limit scope of patent protection of the present invention, scope of patent protection of the present invention is still as the criterion with its claims, the equivalent structure change that every utilization instructions of the present invention and accompanying drawing content are done, in like manner all should be included in protection scope of the present invention.
Claims (7)
1. Electronically Scanned Array radar phase difference measuring device, is characterized in that, comprises phase difference measurement chip, the analog to digital converter be connected with phase difference measurement chip output, and described analog to digital converter is connected with buffer storage, and described buffer storage is connected with interface chip;
Described Electronically Scanned Array radar phase difference measuring device also comprises the clock chip be connected with interface chip, analog to digital converter and buffer storage.
2. Electronically Scanned Array radar phase difference measuring device as claimed in claim 1, it is characterized in that, described buffer storage is FIFO buffer memory.
3. Electronically Scanned Array radar phase difference measuring device as claimed in claim 1, it is characterized in that, described phase difference measurement chip is AD8302.
4. Electronically Scanned Array radar phase difference measuring device as claimed in claim 1, it is characterized in that, described analog to digital converter is AD7865.
5. Electronically Scanned Array radar phase difference measuring device as claimed in claim 1, it is characterized in that, described interface chip is S5933.
6. Electronically Scanned Array radar phase difference measuring device as claimed in claim 1, it is characterized in that, more than one of described phase measurement number of chips, output terminal is all connected with analog to digital converter, and described analog to digital converter is multichannel analog to digital converter.
7. Electronically Scanned Array radar phase difference measuring device as claimed in claim 1, it is characterized in that, described clock chip is DS1302.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310401183.3A CN104422823A (en) | 2013-09-06 | 2013-09-06 | Electronically scanned array radar phase difference measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310401183.3A CN104422823A (en) | 2013-09-06 | 2013-09-06 | Electronically scanned array radar phase difference measuring device |
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| CN104422823A true CN104422823A (en) | 2015-03-18 |
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| CN201310401183.3A Pending CN104422823A (en) | 2013-09-06 | 2013-09-06 | Electronically scanned array radar phase difference measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095658A (en) * | 2018-01-31 | 2019-08-06 | 罗克韦尔柯林斯公司 | Method and system for ESA measurement |
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- 2013-09-06 CN CN201310401183.3A patent/CN104422823A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095658A (en) * | 2018-01-31 | 2019-08-06 | 罗克韦尔柯林斯公司 | Method and system for ESA measurement |
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Application publication date: 20150318 |