Communications: directive radio wave systems and devices (e.g. – Radar transponder system
Patent
1993-04-14
1994-02-15
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
342 51, G01S 1374
Patent
active
052871126
ABSTRACT:
A transponder (14) for communicating with an interrogator (12) has a high Q-factor resonant circuit (34) of frequency f.sub.1 for receiving RF powering signals. The transponder also has a tuning circuit (56,58) which when in electrical communication with the resonant circuit (34) is operable to form a lower Q-factor resonant circuit (60) of frequency f.sub.3 for receiving RF communications from the interrogator unit. The transponder also includes a demodulator (66) which is in electrical communication with said resonant circuit (34). Additionally, the transponder (14) also included a control circuit (40) which receives a demodulated data signal from the demodulator (66). The control circuit (40) is further connected to the tuning circuit (56,58) and is operable to connect the tuning circuit (56,58) to the high Q-factor resonant circuit (34) in order to form the lower Q-factor resonant circuit (60). Control circuit (40) also converts the RF powering signals to a DC current for storing energy. The energy is stored in an energy storage device such as a storage capacitor (46). Other devices, methods and systems are disclosed.
REFERENCES:
patent: 3689885 (1972-09-01), Kaplan et al.
patent: 4042970 (1977-08-01), Atkins
patent: 4713148 (1973-01-01), Cardullo et al.
patent: 4912471 (1990-03-01), Tyburski et al.
patent: 4926182 (1990-05-01), Ohta et al.
patent: 4963887 (1990-10-01), Kawashima et al.
patent: 5053774 (1991-10-01), Schuerman et al.
patent: 5073781 (1991-12-01), Stickelbrocks
U.S. application Ser. No. 07/981,635, Meier et al.
Donaldson Richard L.
Hellner Mark
Kesterson James C.
McCormack Brian C.
Texas Instruments Incorporated
LandOfFree
High speed read/write AVI system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High speed read/write AVI system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High speed read/write AVI system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1210588