US4170759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna sampling system
Assignee: Motorola Solutions Inc
•
Filing: 1977-05-02
•
Granted: 1979-10-09
•
Expires: 1997-05-02
Abstract
Abstract Each of a plurality of antenna sectors is sequentially coupled to a receiver via an antenna switch. The switch is operated by control logic circuitry which monitors the peak signal levels of the signals received by each sector. Unique circuitry is implemented which prevents the control logic from responding to spurious transient signals processed by the receiver's tuned circuits following each instance of antenna switching.
Inventors
- 👤 James R. Stimple
- 👤 Paul M. Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:41
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/24; H04; H04B; H04B7/00; H04B7/02; H04B7/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
192 words
A radio frequency communication system comprising: a sectored antenna means having a plurality of sectors, each sector predeterminedly oriented with respect to the remaining sectors; an antenna switch means having a plurality of input terminals, a control terminal, and an output terminal and further including means responsive to control signals at the control terminal to couple a selected input terminal to the output terminal; antenna coupling means for coupling each antenna sector to a predetermined input terminal of the antenna switch means; receiver means adapted for receiving radio frequency signals; receiver coupling means for coupling the antenna switch means output terminal to the receiver means; detector means for processing the output of the receiver means and detecting the levels of the signals thereat; control logic means responsive to said detector means for generating and applying predetermined control signals to said antenna switch means to cause predetermined switching of the antenna sectors in response thereto; and inhibit means for inhibiting operation of the detector means for a predetermined time interval following each instant of antenna switching, whereby the control logic means is pevented from responding to spurious responses caused by the antenna switching.
Claim 2
Dependent Claim
192 words
A radio frequency communication system comprising: a sectored antenna means having a plurality of sectors, each sector predeterminedly oriented with respect to the remaining sectors; an antenna switch means having a plurality of input terminals, a control terminal, and an output terminal and further including means responsive to control signals at the control terminal to couple a selected input terminal to the output terminal; antenna coupling means for coupling each antenna sector to a predetermined input terminal of the antenna switch means; receiver means adapted for receiving radio frequency signals; receiver coupling means for coupling the antenna switch means output terminal to the receiver means; detector means for processing the output of the receiver means and detecting the levels of the signals thereat; control logic means responsive to said detector means for generating and applying predetermined control signals to said antenna switch means to cause predetermined switching of the antenna sectors in response thereto; and inhibit means for inhibiting operation of the detector means for a predetermined time interval following each instant of antenna switching, whereby the control logic means is pevented from responding to spurious responses caused by the antenna switching.
Claim 3
Dependent Claim
56 words
The radio frequency communication system of claim 1 wherein: the receiver means includes tuned stages; the detector means couples to the output of the tuned stages; and the inhibit means inhibits operation of the detector means for a sufficient interval to prevent spurious responses processed by said receiver tuned stages from affecting said control logic means.
Claim 4
Dependent Claim
35 words
The radio frequency communication system of claim 2 wherein the control logic means responds to the peak amplitude of the received signal from each antenna sector to thereby cause predetermined switching of the antenna sectors.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |