Balance feed sampling receiver
A sampling receiver and balanced feed technology, applied in the electronic field, can solve the problems that dipole antennas cannot be directly connected, affect the detection effect of ultra-wideband radar systems, and the dynamic range of the receiver is small, so as to achieve easy miniaturization, integration, sampling Adjustable bandwidth and excellent performance
Active Publication Date: 2014-07-16
INST OF ELECTRONICS CHINESE ACAD OF SCI
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[0003] In the process of realizing the present invention, the applicant found that equivalent sampling receivers in the prior art are mainly divided into single-ended sampling and balanced sampling forms, and the dynamic range of single-ended sampling receivers is small, and it cannot Directly connected, it is easy to generate reflected signals between the antenna feed point and the receiver input, affecting the detection effect of the ultra-wideband radar system
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[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the...
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The invention provides a balance feed sampling receiver. The balance feed sampling receiver comprises a sampling pulse signal generating circuit, a sample integral retaining circuit and a differential amplification circuit, wherein the sampling pulse signal generating circuit is used for shaping a double-end drive pulse signal to generate a pair of balanced picosecond sampling pulse signals, the front end of the sample integral retaining circuit is electrically connected to the sampling pulse signal generating circuit and the input end of a pulse signal to be sampled, the sample integral retaining circuit is used for carrying out downsampling on the pulse signal to be sampled through the balanced picosecond sampling pulse signals and carrying out underclocking and reconstructing on the base band waveform of the pulse signal to be sampled, the front end of the differential amplification circuit is electrically connected to the sampling integral retaining circuit, and the differential amplification circuit is used for carrying out differential amplification processing on the base band waveform of the reconstructed pulse signal to be sampled and obtaining a low-frequency base band signal widened in the time domain. The balance feed sampling receiver can integrally reconstruct the pulse signal to be sampled, the sampling bandwidth is high and adjustable, and the application requirement of an ultra wide band radar system is met.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a balanced feed sampling receiver. Background technique [0002] UWB radar and communication systems are widely used in today's society, such as road surface detection, steel reinforcement detection inside bridges, geophysical exploration, liquid level sensing, detection and classification of unexploded weapons, mineral exploration, short-range communication inside buildings, etc. Due to its extremely narrow pulse duration, ultra-wideband pulses can effectively immunize against external interference and increase signal transmission rates, making ultra-wideband radar detection have high detection accuracy and distance resolution. For this reason, more and more radar systems transmit information in the form of pulses. For broadband pulse transmission signals, when the receiver collects the echo signals in real time, it needs to use a high-speed A / D conversion chip, which makes...
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IPC IPC(8): G01S7/285
CPCG01S7/285
Inventor 刘丽华夏新凡管洪飞张群英方广有
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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