Radio receiver for use in a radio tracking system
First Claim
1. A radio receiver unit for directionally tracking at least one radio transmitter comprising:
- a housing containing a radio receiver including a directional antenna for receiving radio transmissions from the at least one radio transmitter;
a display, which is electrically coupled to the receiver and fixed in position with respect to the housing, for visually displaying a strength of the radio transmissions received by the directional antenna; and
a field of view limiter for limiting light emanating from the display to a field of view of the display when a user holds the receiver unit in the user'"'"'s hand away from the body of the user, the field of view being limited to planes extending upward from a plane of sight extending from the eyes of the user downward and intersecting a horizontal plane extending from the user'"'"'s waist substantially at arms length of the user.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio receiver unit for directionally tracking at least one radio transmitter in accordance with the invention includes a housing containing a radio receiver including a directional antenna for receiving radio transmissions from the at least one radio transmitter; a display, which is electrically coupled to the receiver and fixed in position with respect to the housing, for visually displaying a strength of the radio transmissions received by the directional antenna; and a field of view limiter for limiting light emanating from the display to a field of view of the display when a user holds the receiver unit in the user'"'"'s hand away from the body of the user, the field of view being limited to planes extending upward from a plane of sight extending from the eyes of the user downward and intersecting a horizontal plane extending from the user'"'"'s waist substantially at arms length of the user.
-
Citations
47 Claims
-
1. A radio receiver unit for directionally tracking at least one radio transmitter comprising:
-
a housing containing a radio receiver including a directional antenna for receiving radio transmissions from the at least one radio transmitter; a display, which is electrically coupled to the receiver and fixed in position with respect to the housing, for visually displaying a strength of the radio transmissions received by the directional antenna; and a field of view limiter for limiting light emanating from the display to a field of view of the display when a user holds the receiver unit in the user'"'"'s hand away from the body of the user, the field of view being limited to planes extending upward from a plane of sight extending from the eyes of the user downward and intersecting a horizontal plane extending from the user'"'"'s waist substantially at arms length of the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A radio receiver unit for directionally tracking at least one radio transmitter comprising:
-
a housing containing a radio receiver including a directional antenna for receiving radio transmissions from the at least one radio transmitter; a display, which is electrically coupled to the receiver and fixed in position with respect to the housing, for visually displaying a strength of the radio transmissions received by the directional antenna from the at least one radio transmitter; and a field of view limiter for limiting light emanating from the display to a field of view of the display wherein in order to view the display a user holds the receiver unit in the user'"'"'s hand away from the body of the user and at least at waist height and above, the field of view subtending an angle not greater than 45°
, the angle being defined by a pair of lines respectively extending between opposed edges of the display and edges of the field of view limiter. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
-
Specification