US 10,235,614 B1 · Communication device and method of making the same

Abstract

A communication device for receiving an interrogation signal at a first carrier frequency and for transmitting a response signal at a second carrier frequency is disclosed. The interrogation signal comprises the first carrier frequency modulated at the second carrier frequency. The communication device includes a sensor coupled to a demodulator. The sensor receives a low frequency input used to further modulate the interrogation signal. The demodulator demodulates the low frequency input from the first carrier frequency to thereby generate the response signal comprising the second carrier frequency and the low frequency input. The demodulator preferably includes a pyroelectric demodulator, a piezoelectric demodulator, or a detector diode. The demodulator preferably has a frequency response less than the first carrier frequency but greater than the second carrier frequency.

Claims17

Dependent claims

A communication device comprising:

a sensor coupled to a demodulator, wherein the demodulator comprises a pyroelectric demodulator;
and
a low-pass filter coupled to the demodulator;
wherein the pyroelectric demodulator includes:
a first silicon dioxide layer over a silicon substrate;
a zinc oxide layer over the first silicon dioxide layer;
a first platinum layer over the zinc oxide layer;
a PZT layer over the first platinum layer;
a second platinum layer over the PZT layer;
a second silicon dioxide layer over the PZT layer;
a tantalum nitride layer over the second silicon dioxide layer;
a third platinum layer over the tantalum nitride layer;
and
a layer over the third platinum layer.

11 more elements

Dependencies are inferred from the claim text.

Communication device and method of making the same

Life of this patent

Communication device and method of making the same

Life of this patent

Abstract

Claims17