System for determining total isotropic sensitivity (TIS) and related methods
AssigneeResearch In Motion Limited
InventorsYihong Qi, Perry Jarmuszewski, Michael Certain
Life of this patent
Estimating the term…
Abstract
A test method for determining total isotropic sensitivity (TIS) of a mobile wireless communications device including a radio frequency (RF) receiver and an antenna coupled thereto may include measuring a sensitivity of the RF receiver, and measuring a three-dimensional (3D) gain pattern of the antenna independent of measuring the sensitivity of the RF receiver. The method may further include determining the TIS of the mobile wireless communications device based upon the sensitivity of the RF receiver and the 3D gain pattern of the antenna.
Claims22
A test method for determining total isotropic sensitivity (TIS) of a mobile wireless communications device comprising a radio frequency (RF) receiver for generating received signal strength (RSSI) values at a relatively coarse granularity and an antenna coupled thereto based upon transmissions from an RF source at a relatively fine granularity, the method comprising:
- measuring a sensitivity of the RF receiver having the relatively fine granularity based upon sweeping relatively coarse and relatively fine RF power values transmitted from the RF source;
- measuring a three-dimensional (3D) gain pattern of the antenna independent of measuring the sensitivity of the RF receiver;
- and
- determining the TIS of the mobile wireless communications device based upon the sensitivity of the RF receiver and the 3D gain pattern of the antenna.
A test method for determining total isotropic sensitivity (TIS) of a mobile wireless communications device comprising a radio frequency (RF) receiver for generating received signal strength (RSSI) values at a relatively coarse granularity and an antenna coupled thereto based up on transmissions from an RF source at a relatively fine granularity, the method comprising:
- calibrating the RF power source;
- measuring a free space path loss between the RF source and a reference antenna and calibrating the RF receiver based thereon;
- measuring a sensitivity of the RF receiver having the relatively fine granularity based upon sweeping relatively coarse and relatively fine RF power values transmitted from the RF source;
- measuring a three-dimensional (3D) gain pattern of the antenna independent of measuring the sensitivity of the RF receiver;
- and
- determining the TIS of the mobile wireless communications device based upon the sensitivity of the RF receiver and the 3D gain pattern of the antenna.
A test system for determining total isotropic sensitivity (TIS) comprising:
- an RF source for transmitting at a relatively fine granularity;
- a mobile wireless communications device comprising a radio frequency (RF) receiver for generating received signal strength (RSSI) values at a relatively coarse granularity and an antenna coupled thereto;
- a wireless communications link coupling said RF source to said mobile wireless communications device;
- and
- a test controller coupled to said RF receiver for
- measuring a sensitivity of said RF receiver having the relatively fine granularity based upon sweeping relatively coarse and relatively fine RF power values transmitted from the RF source,
- measuring a three-dimensional (3D) gain pattern of the antenna independent of measuring the sensitivity of the RF receiver, and
- determining the TIS of said mobile wireless communications device based upon the sensitivity of said RF receiver and the 3D gain pattern of said antenna.
Dependencies are inferred from the claim text.