Frequency mixing passive transponder
First Claim
1. A transponder device, receiving a plurality of waves having differing frequencies, and producing a modified wave therefrom, having a frequency differing from each of the plurality of received waves, and having characteristic distinguishing modifications, said device comprising:
- a mixer, receiving a plurality of waves and producing therefrom a mixed wave having a frequency differing from the plurality of waves;
a wave modifying device, operating to characteristically modify a wave by one or more methods selected from the group consisting of sequentially modulating the wave with a plurality of modulation states and modulating the wave according to a transfer function having a plurality of distinct parameters;
said wave modifying device and said mixer in combination forming a network for producing a wave derived from the received plurality of waves, which is both characteristically modified by said wave modifying device and having a frequency of the mixed wave, said network being arranged with either said characteristically modified wave being one or more of the plurality of waves received by said mixer, or the characteristically modified wave being received derived from the mixed wave from said mixer, or both; and
an output, for emitting the characteristically modified wave externally from said transponder device.
1 Assignment
0 Petitions
Accused Products
Abstract
A transponder device, receiving a plurality of waves having differing frequencies, and producing a wave, having a frequency differing from the plurality of received waves, having characteristic modifications, having a mixer, receiving at least two waves and producing a mixed wave having a frequency differing from the received plurality of waves; and a wave modifying device, producing a characteristically modified wave from an input wave, the mixer being interconnected with the wave modifying device to produce, from the received plurality of waves, an output which is both characteristically modified and at a frequency of the mixed wave. The device may include one or more antenna structures, and preferably produces a mixed wave which is then characteristically modified and emitted from the device. The wave modifying device is, for example, a semiconductor modulator or an acoustic wave device.
245 Citations
37 Claims
-
1. A transponder device, receiving a plurality of waves having differing frequencies, and producing a modified wave therefrom, having a frequency differing from each of the plurality of received waves, and having characteristic distinguishing modifications, said device comprising:
-
a mixer, receiving a plurality of waves and producing therefrom a mixed wave having a frequency differing from the plurality of waves; a wave modifying device, operating to characteristically modify a wave by one or more methods selected from the group consisting of sequentially modulating the wave with a plurality of modulation states and modulating the wave according to a transfer function having a plurality of distinct parameters; said wave modifying device and said mixer in combination forming a network for producing a wave derived from the received plurality of waves, which is both characteristically modified by said wave modifying device and having a frequency of the mixed wave, said network being arranged with either said characteristically modified wave being one or more of the plurality of waves received by said mixer, or the characteristically modified wave being received derived from the mixed wave from said mixer, or both; and an output, for emitting the characteristically modified wave externally from said transponder device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A communication method, comprising the steps of:
-
providing a transponder device, for receiving a plurality of waves having differing frequencies, and producing a wave derived therefrom, having a frequency differing from each of the plurality of received waves and having characteristic modifications, the transponder device having an antenna system for receiving the plurality of waves having differing frequencies and emitting the wave, having a frequency differing from the plurality of received waves and having characteristic modifications; exciting the transponder device with a plurality of waves having differing frequencies; producing a wave in the transponder device having characteristic modifications and a frequency differing from each of the plurality of received waves by one or more methods selected from the group consisting of sequentially modulating the wave with a plurality of modulation states and modulating the wave according to a transfer function having a plurality of distinct parameters; and detecting the wave, having a frequency differing from the plurality of received waves, and having characteristic modifications. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
-
34. A transponder device, receiving a plurality of radio frequency waves having differing frequencies, and producing a modified wave derived therefrom, having a frequency differing from each of the plurality of received waves, and having characteristic modifications capable of being distinguished from waves of the same frequency having differing characteristic modifications, said device comprising:
-
an antenna system for receiving the plurality of radio frequency waves and transmitting the modified wave; a mixer, receiving a plurality of waves from said antenna system and producing a mixed wave having a frequency differing from the received plurality of waves; a wave modifying device, receiving the mixed wave from said mixer and producing the modified wave derived therefrom, having a transfer function selected from one or more of the group consisting of a characteristic set of identifying transfer function coefficients and a characteristic time sequence of identifying symbols, the modified wave being returned to said antenna system for transmission. - View Dependent Claims (35, 36, 37)
-
Specification