# US 9,439,151 B2 · Method for intelligently switching on/off mobile terminal antenna and corresponding mobile terminal

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- Number: US 9,439,151 B2
- Document ID: US9439151B2
- Status: Granted
- Kind: B2
- Application number: 14/400,240
- Filed: 2012-07-13
- Published: 2015-05-14
- Granted: 2016-09-06
- Earliest claimed: 2012-05-11
- Assignees: Zte Corporation
- Applicants: Dalong Zhu; Yimu Hu; Aiguo Yuan; Jinlu Xu
- Inventors: Dalong Zhu; Yimu Hu; Aiguo Yuan; Jinlu Xu
- Web page: https://patentgrep.com/patent/US9439151B2

## CPC

- H04W 52/028: {switching on or off only a part of the equipment circuit blocks}
- H01Q 1/243: {with built-in antennas}
- H01Q 5/378: Combination of fed elements with parasitic elements
- H01Q 9/0442: {with particular tuning means}
- H01Q 9/42: with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
- H01Q 19/005: {Patch antenna using one or more coplanar parasitic elements}
- H04B 1/44: Transmit/receive switching
- H04W 52/0229: {where the received signal is a wanted signal}
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)
- H04B: TRANSMISSION
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A method for intelligently switching on/off an antenna of a mobile terminal and a corresponding mobile terminal are provided. A method includes: detecting a current working frequency band and a surrounding environment of a terminal; and according to a preset correspondence among an antenna radiation unit, an environmental condition, and the current working frequency band, changing impedance characteristics of a parasitic unit radiator. Another method includes: detecting a current working frequency band of a terminal; and according to a preset correspondence between an antenna radiation unit and the current working frequency band, changing impedance characteristics of a parasitic unit radiator. Another method includes: detecting a current surrounding environment of a terminal; and according to a preset correspondence between an antenna radiation unit and an environmental condition, changing impedance characteristics of a parasitic unit radiator. The terminal includes: a detection unit, an antenna control unit, and an antenna radiation unit.

## Claims

### Claim 1

A mobile terminal intelligently switching on/off an antenna, comprising a detection unit, an antenna control unit, and an antenna radiation unit which comprises a main feed unit radiator and a parasitic unit radiator, wherein,
the detection unit is configured to detect a current working frequency band of the mobile terminal and transmit a detection result to the antenna control unit;
the antenna control unit is configured to receive the detection result transmitted by the detection unit and change an impedance characteristic of the parasitic unit radiator according to a preset correspondence between the antenna radiation unit and the current working frequency band; and
the parasitic unit radiator is configured to change the impedance characteristic in accordance with the control of the antenna control unit;
wherein,
the antenna control unit is configured to change the impedance characteristic of the parasitic unit radiator according to the following way: transmitting an instruction to the parasitic unit radiator in the antenna radiation unit to switch on one or more parasitic units in the parasitic unit radiator and/or switch off one or more parasitic units in the parasitic unit radiator; and
the parasitic unit radiator is configured to change the impedance characteristic in accordance with the control of the antenna control unit according to the following way: switching on one or more parasitic units in the parasitic unit radiator according to the instruction transmitted by the antenna control unit;
wherein the parasitic units are neither grounded nor connected to the main feed unit radiator before being switched on, and are grounded but still not connected to the main feed unit radiator after being switched on.

### Claim 2 (depends on 1)

The mobile terminal according to claim 1, wherein,
the detection unit is further configured to detect a current surrounding environment of the mobile terminal and transmit a detection result to the antenna control unit; and
the antenna control unit is further configured to change an impedance characteristic of the parasitic unit radiator according to a preset correspondence between the antenna radiation unit and the environment condition, or a preset correspondence among the antenna radiation unit, the environmental condition, and the current working frequency band.

### Claim 3 (depends on 2)

The mobile terminal according to claim 2, wherein, the detection unit is configured to detect the current surrounding environment of the mobile terminal according to one or more of the following ways:
detecting whether the mobile terminal works in a free space;
detecting whether there is a human body approaching the mobile terminal;
detecting whether the mobile terminal is indoors; and
detecting whether the mobile terminal is outdoors.

### Claim 4

A mobile terminal intelligently switching on/off an antenna, comprising a detection unit, an antenna control unit, and an antenna radiation unit which comprises a main feed unit radiator and a parasitic unit radiator, wherein,
the detection unit is configured to detect a current surrounding environment of the mobile terminal and transmit a detection result to the antenna control unit;
the antenna control unit is configured to receive the detection result transmitted by the detection unit and change an impedance characteristic of the parasitic unit radiator according to a preset correspondence between the antenna radiation unit and the environment condition; and the parasitic unit radiator is configured to change the impedance characteristic in accordance with the control of the antenna control unit;
wherein
the antenna control unit is configured to change the impedance characteristic of the parasitic unit radiator according to the following way: transmitting an instruction to the parasitic unit radiator in the antenna radiation unit to switch on one or more parasitic units in the parasitic unit radiator and/or switch off one or more parasitic units in the parasitic unit radiator; and
the parasitic unit radiator is configured to change the impedance characteristic in accordance with the control of the antenna control unit according to the following way: switching on one or more parasitic units in the parasitic unit radiator according to the instruction transmitted by the antenna control unit;
wherein the parasitic units are neither grounded nor connected to the main feed unit radiator before being switched on, and are grounded but still not connected to the main feed unit radiator after being switched on.

### Claim 5 (depends on 4)

The mobile terminal according to claim 4, wherein, the detection unit is configured to detect the current surrounding environment of the mobile terminal according to one or more of the following ways:
detecting whether the mobile terminal works in a free space;
detecting whether there is a human body approaching the mobile terminal;
detecting whether the mobile terminal is indoors; and
detecting whether the mobile terminal is outdoors.

### Claim 6

A method for intelligently switching on/off an antenna of a mobile terminal, an antenna radiation unit of the mobile terminal comprising a main feed unit radiator and a parasitic unit radiator, the method comprising:
detecting a current working frequency band by the mobile terminal; and
the mobile terminal changing an impedance characteristic of the parasitic unit radiator according to a preset correspondence between the antenna radiation unit and the current working frequency band;
wherein, the step of changing the impedance characteristic of the parasitic unit radiator comprises:
switching on one or more parasitic units which are neither grounded nor connected to the main feed unit radiator before being switched on in the parasitic unit radiator to make parasitic units switched on grounded but still not connected to the main feed unit radiator.

### Claim 7

A method for intelligently switching on/off an antenna of a mobile terminal, an antenna radiation unit of the mobile terminal comprising a main feed unit radiator and a parasitic unit radiator, the method comprising:
detecting a current surrounding environment by the mobile terminal; and
the mobile terminal changing an impedance characteristic of the parasitic unit radiator according to a preset correspondence between the antenna radiation unit and the environment condition;
wherein, the step of changing the impedance characteristic of the parasitic unit radiator comprises: switching on one or more parasitic units which are neither grounded nor connected to the main feed unit radiator before being switched on in the parasitic unit radiator to make parasitic units switched on grounded but still not connected to the main feed unit radiator.

### Claim 8 (depends on 7)

The method according to claim 7, wherein, the step of detecting a current surrounding environment of the mobile terminal comprises one or more of the following detections:
detecting whether the mobile terminal works in a free space;
detecting whether there is a human body approaching the mobile terminal;
detecting whether the mobile terminal is indoors; and
detecting whether the mobile terminal is outdoors.

### Claim 9

A method for intelligently switching on/off an antenna of a mobile terminal, an antenna radiation unit of the mobile terminal comprising a main feed unit radiator and a parasitic unit radiator, the method comprising:
detecting a current working frequency band and a current surrounding environment by the mobile terminal; and
the mobile terminal changing an impedance characteristic of the parasitic unit radiator according to a preset correspondence among the antenna radiation unit, the environmental condition, and the current working frequency band;
wherein, the step of changing the impedance characteristic of the parasitic unit radiator comprises:
switching on one or more parasitic units which are neither grounded nor connected to the main feed unit radiator before being switched on in the parasitic unit radiator to make parasitic units switched on grounded but still not connected to the main feed unit radiator.

### Claim 10 (depends on 9)

The method according to claim 9, wherein, the step of detecting a current surrounding environment of the mobile terminal comprises one or more of the following detections:
detecting whether the mobile terminal works in a free space;
detecting whether there is a human body approaching the mobile terminal;
detecting whether the mobile terminal is indoors; and
detecting whether the mobile terminal is outdoors.