Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Reexamination Certificate
2011-03-29
2011-03-29
Lu, Zhiyu (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
C455S042000
Reexamination Certificate
active
07917093
ABSTRACT:
A wireless monitoring system using a base station and a child station, includes the base station including a base-station transmitting and a base-station receiving antenna, and the child station including a child-station receiving antenna, a nonlinear, a smoothing circuit, a first high-frequency band-pass filter, an intermediate-frequency band-pass filter, a demodulator, a baseband, a modulator, and a child-station transmitting antenna. The base-station transmitting antenna and the child-station receiving antenna include circularly-polarized antennas which have a same rotating direction, and the child-station transmitting antenna and the base-station receiving antenna include circularly-polarized antennas which have a polarization characteristic rotating in a direction opposite to the base-station transmitting antenna and the child-station receiving antenna.
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Sungjoon Lim, et al., “Microwave Theory and Techniques, IEEE Transactions; Adaptive Power Controllable Retrodirective Array System for Wireless Sensor Server Applications, vol. 53, Issue. 12; Dec. 2005, p. 3735-3743”.
K.V. Seshagiri Rao, et al. “IEEE Transactions on Antennas and Propagation; Antenna Design for UHF RFID Tags: A Review and a Practical Application, vol. 53, No. 12, Dec. 2005, p. 3870-3876”.
Hitachi Cable Ltd.
Lu Zhiyu
McGinn IP Law Group PLLC
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