Microwave sensor of needle type antenna
A microwave sensor, needle technology, applied in resonant antenna, radio wave measurement system, radio wave reflection/re-radiation and other directions, can solve the problems of weak signal, irregular waveform coverage, insufficient sensitivity, etc. Weak penetration effect
Inactive Publication Date: 2009-01-07
深圳市西柯南电子科技有限公司
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Problems solved by technology
[0007] To sum up, the existing deficiencies and defects in the application of microwave sensors suitable for automatic lamp control are mainly manifested in: weak signal, insufficient sensitivity; extremely irregular waveform coverage; microwave sensors with 5.8G frequency or lower frequency have Penetration, microwave leakage produces malfunction
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Embodiment 1
[0030] The microwave sensor in this example is a 10.525GHz frequency microwave transmitting and receiving device, or Doppler radar. Using 10.525G frequency, its penetrability is weak and it is not easy to leak, so there will be no false alarm due to human body displacement in the non-sensing area.
[0031] Please combine Figure 5 , Figure 6 and Figure 7 As shown, the microwave sensor in this example includes a pin-type transmitting antenna 1 and a pin-type receiving antenna 2, a microwave transceiver module and a signal processing module. The type transmitting antenna Y1 and the pin type receiving antenna Y2 are electrically connected to the circuit board 3, and are fixed on the casing and arranged outside the casing. Such as Figure 5 , Figure 6 As shown, the microwave transceiver module includes a microwave detection diode, a microwave oscillating device, a ceramic medium and an analog signal amplifier. The microwave generated by the microwave oscillating device is c...
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The invention discloses a probe antenna microwave sensor which comprises a probe antenna and a microwave transceiver module; the probe antenna comprises a probe transmitting antenna for microwave transmission and a probe receiving antenna for receiving microwave; a transceiving signal is polarized to an approximately round thick cross shape, thus preventing the microwave coverage area from being deformed to an approximately elliptical maple leaf shape due to the mutual polarization while using a plane antenna. By adopting the probe antenna microwave sensor for ceiling mounting, the projected microwave coverage area is approximately round, thus the sensing distance of each direction is approximately equivalent and the microwave sensor can be applied to more fields than before, in particular to the fields of auto-lights, etc. The technical proposal of the invention breaks through the habitual proposal in the prior art; and the probe antenna microwave sensor replaces the probe antenna with transmitting and receiving functions by two antennas one of which has transmitting function and the other of which has receiving function, which brings unexpected technical effects.
Description
【Technical field】 [0001] The invention relates to a microwave sensor. 【Background technique】 [0002] Planar microstrip dielectric resonance sensor, also known as Doppler microwave sensor or Doppler radar, uses the Doppler principle to detect moving objects. At present, the 10.525G frequency Doppler radars produced by Germany, the United Kingdom, Israel and Singapore use planar antennas to transmit microwaves and receive reflected waves. Planar antennas have insurmountable technical blind spots in some fields. As shown in Figure 1, the 3dB beamwidth of the microwave vertical plane is between 40 degrees and 45 degrees; as shown in Figure 2, the 3dB beamwidth of the microwave horizontal plane Between 83 degrees and 86 degrees. [0003] If the Doppler radar is installed on the ceiling, the sensing surface projected by it will be an irregular ellipse. In terms of automatic control, most require the sensing surface to be circular, so that the sensing distance in each direction...
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IPC IPC(8): H01Q21/28H01Q9/30G01S13/02G01S13/50
Inventor 胡波清
Owner 深圳市西柯南电子科技有限公司