| US 7,555,294 B2 | ||
| System for determining total isotropic sensitivity (TIS) and related methods | ||
| Yihong Qi, St. Agatha (Canada); Perry Jarmuszewski, Waterloo (Canada); and Michael Certain, Kitchener (Canada) | ||
| Assigned to Research In Motion Limited, Waterloo, Ontario (Canada) | ||
| Filed on Mar. 01, 2006, as Appl. No. 11/365,233. | ||
| Prior Publication US 2007/0207756 A1, Sep. 06, 2007 | ||
| Int. Cl. H04W 24/00 (2006.01) | ||
| U.S. Cl. 455—425 [455/423; 455/67.11; 455/67.12; 455/67.13; 455/226.1; 455/226.2; 455/226.3; 455/254; 716/4; 343/703] | 22 Claims |
| 1. 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.
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