Filter of Fu Manwei SAW is enclosed in the detailed application in radar

Fu Manwei uses a field mediumly in radar, pertinent information shows, SAW filter is producing main effect in radar receiver, can filter divides stray signal, assure the definition of target signal. Because SAW filter has the characteristic of high quality factor and small loss, received wide application in radar so.

SAW filter is one kind is based on technology of surface acoustic wave to realize the equipment of signal filter wave, it is based on the character of piezocrystal, the frequency choice that the surface acoustic wave that travels through crystal surface will come to realize signal and filter wave. Its structure includes piezocrystal, electrode and underlay. When the job, input signal enters filter through inputting end, electrode brings to bear on wave of watch of sound of electric field generation, acoustical watch wave travels in piezocrystal surface and with electrode interaction, only the signal of specific frequency limits can pass filter, the signal of other frequency is restrained or block, the signal after filter wave carries output from output.

In radar system, SAW filter uses his the advantage such as high-powered, small loss and temperature stability, undertake to the signal that receive accurate filter wave is handled, conduce to the property that promotes radar the system and accuracy. However, it is about filter of Fu Manwei SAW at present in radar the message that encloses the respect such as form and detailed application parameter specificly still is mixed very not clearly detailed. But OK and affirmatory is, as ceaseless development of the technology and innovation, it is more important that SAW filter hopeful of Fu Manwei is developed in radar domain the action with diversification, provide strong support to optimize and be improved of radar system.

Filter of Fu Manwei SAW encloses in the detailed application in radar to include:

• Signal filter wave: The signal that radar system needs to the butt joint closes and blast off has filter wave, the frequency part that does not need with purify and interference signal. SAW filter can realize pair of specific frequency paragraph signal has filter wave, the letter a confusion of voices that improves radar system is compared and interference rejection ability.
• Frequency choice: Radar system needs to work on different frequency normally, in order to realize different function. SAW filter can help radar system choose specific frequency, realize frequency answer to use with much frequency paragraph the job.
• Punch of arteries and veins shrinks: In radar system, pulse is compressed is a kind of technology that improves distance resolution. SAW filter can be used at realizing pulse to compress, through undertaking filter wave and modulation to transmit, make its can implement narrower pulse width and higher resolution in sink.
• Beam figuration: Beam figuration is one kind is passed those who control aerial array is phasic with extent, implementation beam is pointed to and technology of beam width pilot. SAW filter can be used in beam figuration system, undertake to the signal of aerial array filter wave is mixed phasic adjust, realize the accurate control of beam.

Filter of Fu Manwei SAW encloses a technology mediumly in radar

Filter of Fu Manwei SAW encloses a technology mediumly in radar is a crucial link. Of SAW filter enclose need to consider a variety of factors, in order to ensure its stabilize reliably job in complex radar environment. Enclose use metallic box to wait for a structure normally, can protect the crucial part such as in-house piezocrystal, electrode and underlay effectively.

Filter of Fu Manwei SAW is enclosed in the application in radar of for military use

Filter of Fu Manwei SAW is enclosed in radar of for military use to producing main effect. Radar of for military use asks to the accuracy of signal and interference rejection ability extremely tall, SAW filter can effectively filter divides clutter and interference signal, promote the exploration ability of radar and target identifying precision. Its are high quality the character of factor and small loss conduces to the action distance that enhances radar and resolution. In addition, radar of for military use works to fall in harsh ambient conditions normally, of filter of Fu Manwei SAW enclose need to have good aseismatic, fight high temperature, fight the function such as microtherm, still can work in order to ensure normally below extreme environment.

Filter of Fu Manwei SAW is enclosed in the application in civil radar

In civil radar domain, SAW filter encloses Fu Manwei to also have wide application. For example, prevent in the car of traffic domain in bumping into radar, SAW filter can help radar accurate detect the fraise all round car, enhance security of drive a vehicle. In weather radar, it filters effectively useless signal, raise what change to atmosphere to monitor precision. In civil aviation domain, the SAW filter in radar conduces to the flight safety that ensures a plane. Compare with photograph of radar of for military use, the civil radar demand to cost and bulk may be higher, because this is enclosed in the meeting below the premise of contented function,pay attention to miniaturization and cost control more.