US 9,002,297 B2Granted

Mobile device and tunable antenna therein

AssigneeHTC Corporation

InventorsJu-Hung Chen, Chien-Pin Chiu, Chang-Yen Cheng, Chi-Hsien Chiu

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Abstract

A mobile device includes an antenna, an ESD (Electrostatic Discharge) protection component, a plurality of branches, and a switch. The antenna is configured to transmit and receive an RF (Radio Frequency) signal. The branches provide different inductances or different capacitances, and are respectively coupled to a ground voltage terminal. The switch is coupled through the ESD protection component to the antenna, and switches between the branches according to a control signal such that the antenna is capable of operating in a plurality of frequency intervals. The ESD protection component is configured to protect the switch from being damaged.

Claims20

Dependent claims

A mobile device, comprising:

an antenna, transmitting and receiving an RF (Radio Frequency) signal;
an ESD (Electrostatic discharge) protection component;
a plurality of branches, providing different inductances or capacitances, and respectively coupled to a ground voltage terminal;
and
a switch, coupled through the ESD protection component to the antenna, and switching between the branches according to a control signal such that the antenna is capable of operating in a plurality of frequency intervals,
wherein the ESD protection component is configured to protect the switch from being damaged,
wherein the mobile device further comprises:
a processor, coupled to the switch and the antenna, and performing a selection procedure to generate the control signal, and
wherein the selection procedure comprises the steps of:
obtaining, by the antenna, a signal indicator of the RF signal;
determining, by the processor, whether the signal indicator is greater than or equal to a first threshold value;
if not, performing a scan procedure to cause the antenna to operate in all of the frequency intervals one after another;
during the scan procedure, monitoring, by the processor, the signal indicator to search for a maximum value of the signal indicator;
and
controlling the antenna to operate in a target frequency interval corresponding to the maximum value of the signal indicator.

12 more elements

A mobile device, comprising:

an antenna, transmitting and receiving an RF (Radio Frequency) signal;
an ESD (Electrostatic discharge) protection component;
a plurality of branches, providing different inductances or capacitances, and respectively coupled to a ground voltage terminal;
and
a switch, coupled through the ESD protection component to the antenna, and switching between the branches according to a control signal such that the antenna is capable of operating in a plurality of frequency intervals,
wherein the ESD protection component is configured to protect the switch from being damaged,
wherein the mobile device further comprises:
a processor, coupled to the switch and the antenna, and performing a selection procedure to generate the control signal, and
wherein the selection procedure comprises the steps of:
obtaining, by the antenna, a signal indicator of the RF signal;
determining, by the processor, whether the signal indicator is greater than a first threshold value;
if not, performing a scan procedure to cause the antenna to operate in at least a portion of the frequency intervals one after another;
during the scan procedure, monitoring, by the processor, the signal indicator to search for an allowable value of the signal indicator, wherein the allowable value is greater than the first threshold value;
and
controlling the antenna to operate in a target frequency interval corresponding to the allowable value of the signal indicator.

12 more elements

Dependencies are inferred from the claim text.