US 2006/0140253 A1 · Ultra-wideband transmitter and transceiver using the same

Abstract

An ultra-wideband transmitter is provided which can reduce a leak of a local signal into a transmitted signal with a pulse train output from an antenna in UWB-IR communication. The transmitter comprises a pulse generator 0140 for generating a pulse signal having a pulse train of pulses produced intermittently according to data to be transmitted, an oscillator 0120 for producing a local signal, a frequency converter 0130 to which the pulse signal output from the pulse generator and the local signal output from the oscillator are input, and for frequency-converting the pulse signal to output a RF signal, an amplifier 0110 for amplifying the RF signal output from the frequency converter, and an antenna 0000 for emitting the RF signal output from the amplifier in the air. In a period corresponding to a pause period of the pulses produced intermittently, a leak of the local signal into the RF signal output from the antenna is reduced using a control signal 0300.

Claims19

Dependent claims

A transmitter comprising:

a pulse generator for generating a first signal arranged in a pulse train of pulses produced intermittently according to data to be transmitted;
an oscillator for producing a second signal which is a continuous wave;
a frequency converter to which the first signal output from the pulse generator and the second signal output from the oscillator are input, and for frequency-converting the first signal to output a third signal;
an amplifier for amplifying the third signal output from the frequency converter;
and
an antenna for emitting the third signal output from the amplifier in the air,
wherein a leak of the second signal into the third signal output from the antenna is reduced in a pause period of the pulses produced intermittently.

4 more elements

A transceiver comprising:

a transmitter circuit for receiving transmitted data input, and outputting a third signal;
an antenna for emitting the transmitted signal in the air, and receiving a radio wave reaching to output a fourth signal;
a receiving circuit to which the fourth signal output from the antenna is input, and for outputting received data;
and
a changeover device for switching between a connection between the transmitter circuit and the antenna, and a connection between the antenna and the receiving circuit,
the transmitter circuit comprising:
a pulse generator for generating a first signal arranged in a pulse train of pulses produced intermittently according to data to be transmitted;
an oscillator for producing a second signal which is a continuous wave;
a frequency converter to which the first signal output from the pulse generator and the second signal output from the oscillator are input, and for frequency-converting the first signal to output a third signal;
an amplifier for amplifying the third signal output from the frequency converter;
and
the antenna for emitting the third signal output from the amplifier in the air,
wherein a leak of the second signal into the third signal output from the antenna is reduced in a pause period of the pulses produced intermittently.

10 more elements

Dependencies are inferred from the claim text.

Ultra-wideband transmitter and transceiver using the same

Life of this patent

Ultra-wideband transmitter and transceiver using the same

Life of this patent

Abstract

Claims19