US 7,116,960 B2 · Image-rejecting antenna apparatus

Abstract

An image-rejecting antenna apparatus includes an antenna unit for receiving or transmitting a wireless signal and an image-reject unit for removing an image component signal having a predetermined frequency from among signals received from the antenna unit. In an image-rejecting antenna apparatus that receives a predetermined signal and provides a processed signal to a RF circuit unit for performing a predetermined function may also include an impedance matching unit for matching an impedance of the antenna unit with an impedance of the RF circuit unit and for providing the signal from which the image component signal has been removed to the RF circuit unit. A noise component of an image frequency that is transmitted to a subsequent circuit can be minimized or removed by including an image-reject unit when designing an antenna and a matching circuit, thereby improving the image-rejecting capabilities of an entire receiver.

Claims4

Dependent claims

An image-rejecting antenna apparatus comprising:

an antenna for receiving a wireless signal, the antenna adapted for removing an image component of the wireless signal;
and
an image-reject unit coupled to the antenna, wherein the antenna includes at least one notch filter coupling adjacent portions of elements of the antenna and tuned to a center frequency of the image component of the wireless signal, and wherein the antenna is a dipolar wire antenna including:
a first wire element comprising a first notch filter of the at least one notch filter, the first notch filter coupled in series with portions of the first wire element;
and
a second wire element comprising a second notch filter of the at least one notch filter, the second notch filter coupled in series with portions of the second wire element.

3 more elements

Dependencies are inferred from the claim text.

Image-rejecting antenna apparatus

Life of this patent

Image-rejecting antenna apparatus

Life of this patent

Abstract

Claims4