Please select the most similar patent number from A, B, C and D. Which number is?
Provided are a microwave Doppler detection module and device. The microwave Doppler detection module comprises an electromagnetic reflection surface and at least one pair of dual coupling polarons disposed at an interval from the electromagnetic reflection surface, wherein the pair of dual coupling polarons has a first feed end and a second feed end; a first radiation source electrode and a second radiation source electrode respectively extend from the two feed ends; the first feed end and the second feed end approach each other; and when the first radiation source electrode and the second radiation source electrode are respectively subjected to source feeding and power feeding of the same excitation signal at the first feed end and the second feed end, the current and potential distributions of the first radiation source electrode and the second radiation source electrode can be in a dual distribution state around the center point of a connecting line of the first feed end and the second feed end, and the radiation source electrodes are then coupled in a dual manner, such that the size requirement for the microwave Doppler detection module is reduced, and the formation of a detection dead zone can be avoided.
A: A mobile terminal and an antenna control method, wherein the mobile terminal comprises a first module (1) and a second module (2), which can be in a folded state or unfolded state; a first antenna radiation branch (4) is arranged on the first module (1), a first feed point (41) and a first ground point (42) are arranged on the first antenna radiation branch (4), and the first antenna radiation branch (4) is electrically connected with a first feed source (7) through an on-off switch (5); a second antenna radiation branch (3) is arranged on the second module (2), a second feed point (31) and a second ground point (32) are arranged on the second antenna radiation branch (3); when the first module (1) and the second module (2) are in the folded state, the on-off switch (5) is in the off state; and when the first module (1) and the second module (2) are in the unfolded state, the on-off switch (5) is in the on state.
B: Disclosed by the present invention are an antenna control method and an antenna apparatus. An antenna apparatus comprises a first casing (900) and a second casing (902) capable of moving relative to the first casing (900), the first casing (900) comprising a first radiator (806), and the second casing (902) comprising a second radiator (910); a signal source (600, 602); and a coupling component (70), the coupling component (70) being electrically connected to the first radiator (806) and the second radiator (910) when the first casing (900) and the second casing (902) approach one another, and the first radiator (806) and the second radiator (910) combining into a new radiator. In the embodiments of the present invention, a folded first radiator and second radiator may be combined into a new radiator, which is beneficial in reducing the possibility that the performance of an original antenna will decline due to folding, thereby improving the antenna performance of foldable electronic devices.
C: A waterproof RFID tag comprises a rectangular PCB reflective plate (G1). A microstrip antenna is disposed on one side of the PCB reflective plate (G1), and an RFID chip (2) is disposed on the other side of the PCB reflective plate (G1). The RFID chip (2) is in signal connection with the microstrip antenna. The microstrip antenna comprises a first microstrip unit and a second microstrip unit that are vertically symmetrical and that have a same shape. The microstrip antenna also comprises a first feeding sheet (G51) and a second feeding sheet (G52). The first feeding sheet (G51) and the second feeding sheet (G52) are disposed on the same side of the PCB reflective plate (G1). The first feeding sheet (G51) is used for being in feeding connection with the first microstrip unit, and the second feeding sheet (G52) is used for being in feeding connection with the second microstrip unit. By means of proper arrangement, the waterproof RFID tag has good RFID tag characteristics, a long distance and excellent antenna performance.
D: An anti-interference microwave detection module, comprising an oscillation circuit (10), a transmitting unit (30), a receiving unit (40), a frequency mixing detection unit (20), a frequency selection unit (50) and a fluctuating signal conversion unit (60). Further disclosed is an anti-interference method for the anti-interference microwave detection module, wherein the anti-interference microwave detection module reduces the interference of electromagnetic radiation of frequency bands different from that of the anti-interference microwave detection module in an environment on echo signals of the anti-interference microwave detection module by means of frequency selection, and further obtains a fluctuating signal by means of trending Doppler intermediate frequency signals. Then, fluctuating feature parameters in the fluctuating signal correspond to action features of objects in a detection space, so that the anti-interference microwave detection module may completely feed back the action features of objects in the detection space, thereby reducing the interference of electromagnetic radiation in the environment on the fluctuating signal, comprising the interference of electromagnetic radiation in the same frequency band as that of the anti-interference microwave detection module on the fluctuating signal.
Answer: D