Mobile wireless communication terminal and method of matching antenna in the same
AssigneeNEC Corporation
InventorNaoaki Oodaira
Life of this patent
Estimating the term…
Abstract
The mobile wireless communication terminal includes a first antenna, a second antenna, a signal-level detector which detects a level of a signal having been transmitted from the second antenna and having been received through the first antenna, and a matching unit which matches the first antenna by selecting a matching constant of the first antenna to optimize the signal-level detected by the signal-level detector.
Claims16
A mobile wireless communication terminal comprising:
- a first antenna;
- a second antenna;
- a signal-level detector which detects a level of a signal having been transmitted from said second antenna and having been received through said first antenna;
- a matching unit which matches said first antenna by selecting a matching constant of said first antenna to optimize said signal-level detected by said signal-level detector, said matching unit selects a matching constant ensuring an optimal signal-level, among signal-levels detected by said signal-level detector in accordance with each of a plurality of matching constants;
- and
- a memory storing both reference signal-levels detected by said signal-level detector when said matching constant is set equal to each of predetermined reference constants, and matching constants selected by said matching unit immediately before and immediately after said reference signal-levels are detected, each of said reference signal-levels being in correlation with each of said matching constants in said memory,
- wherein said matching unit selects a matching constant in correlation with a newly detected reference signal-level in accordance with the correlation stored in said memory between said reference signal-levels and said matching constants.
A method of matching a first antenna in a mobile wireless communication terminal including a first antenna and a second antenna, comprising:
- (a) detecting a level of a signal having been transmitted from said second antenna and having been received through said first antenna;
- (b) matching said first antenna by selecting a matching constant of said first antenna to optimize said signal-level detected by said signal-level detector a matching constant ensuring an optimal signal-level is selected among signal-levels detected in accordance with each of a plurality of matching constants;
- and
- (c) storing both reference signal-levels detected when said matching constant is set equal to each of predetermined reference constants, and matching constants selected immediately before and immediately after said reference signal-levels are detected, each of said reference signal-levels being in correlation with each of said matching constants,
- wherein a matching constant in correlation with a newly detected reference signal-level is selected in said step (b) in accordance with the stored correlation between said reference signal-levels and said matching constants.
A read-only memory with a computer program stored thereon for causing a computer to carry out a method of matching a first antenna in a mobile wireless communication terminal including a first antenna and a second antenna, steps executed by said computer in accordance with said program including:
- (a) detecting a level of a signal having been transmitted from said second antenna and having been received through said first antenna;
- (b) matching said first antenna by selecting a matching constant of said first antenna to optimize said signal-level detected by said signal-level detector, a matching constant ensuring an optimal signal-level is selected among signal-levels detected in accordance with each of a plurality of matching constants;
- and
- (c) storing both reference signal-levels detected when said matching constant is set equal to each of predetermined reference constants, and matching constants selected immediately before and immediately after said reference signal-levels are detected, each of said reference signal-levels being in correlation with each of said matching constants,
- wherein a matching constant in correlation with a newly detected reference signal-level is selected in said step (b) in accordance with the stored correlation between said reference signal-levels and said matching constants.
Dependencies are inferred from the claim text.