Receiver and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorHajime KANDO
Life of this patent
Estimating the term…
Abstract
A receiver includes a quadrature mixer to perform frequency conversion to convert a radio-frequency signal into an I signal and a Q signal that have a 90° phase difference from each other and a surface acoustic wave (SAW) device to perform phase conversion on the I signal and the Q signal that are output from the quadrature mixer. In the SAW device, when α° represents a phase rotation amount of the I signal, β° represents a phase rotation amount of the Q signal, and n is an integer, (α+90±n×360−35.1)≤β≤(α+90+n×360+35.1) or (α−90+n×360−35.1)≤β≤(α−90+n×360+35.1).
Claims20
A receiver comprising:
- a quadrature mixer to perform frequency conversion to convert a radio-frequency signal into an I signal and a Q signal that have a 90° phase difference from each other;
- and
- an acoustic wave device to perform phase conversion on the I signal and the Q signal that are output from the quadrature mixer;
- wherein
- in the acoustic wave device, when α° represents a phase rotation amount of the I signal, β° represents a phase rotation amount of the Q signal, and n is an integer:
- (
- α
- +
- 90
- +
- n
- ×
- 360
- -
- 35.1
- )
- ≤
- β
- ≤
- (
- α
- +
- 90
- +
- n
- ×
- 360
- +
- 35.1
- )
- ,
- or
-
- (
- α
- -
- 90
- +
- n
- ×
- 360
- -
- 35.1
- )
- ≤
- β
- ≤
- (
- α
- -
- 90
- +
- n
- ×
- 360
- +
- 35.1
- )
- .
A receiver comprising:
- a quadrature mixer to perform frequency conversion to convert a radio-frequency signal into an I signal and a Q signal that have a 90° phase difference from each other;
- and
- an acoustic wave device to perform phase conversion on the I signal and the Q signal that are output from the quadrature mixer;
- wherein
- in the acoustic wave device, the 90° phase difference is generated by at least one acoustic wave device using a resonance mode.
Dependencies are inferred from the claim text.