公开(公告)号：DE2815667A1

公开(公告)日：1978-11-09

申请号：DE2815667

申请日：1978-04-11

Applicant: MOTOROLA INC

Inventor： CRAIG TIMOTHY PHILIP ,  STIMPLE JAMES ROY

IPC: H01Q3/24 ,  H04B7/08 ,  H04B7/10 ,  H04B7/26

Abstract: SECTORED ANTENNA RECEIVING SYSTEM A plurality of horizontally directive antenna sectors are arranged in configuration to receive signals from remote transmitters over a given angle in the horizontal plane. A scanning system is operative in one of several modes to sequentially couple each sector to a receiver. In its first mode, each sector is sequentially scanned with the output signal level therefrom being compared to a reference level. If the signal level on any sector exceeds the reference level the scanner activates to its second mode wherein scanning continues for a predetermined interval. At the end of the interval, scanning is inhibited and the receiver is coupled to that sector which produced the strongest signal level during the second mode scanning cycle. In the inhibit scan mode, if the signal level from the sector falls to a minimum level for a given time period the system reverts to the first scanning mode.

公开(公告)号：DE2815670A1

公开(公告)日：1978-11-09

申请号：DE2815670

申请日：1978-04-11

Applicant: MOTOROLA INC

Inventor： CRAIG TIMOTHY PHILIP ,  STIMPLE JAMES ROY ,  ERICKSON PAUL MILTON

IPC: H01Q3/24 ,  H04B7/08 ,  H04B7/10 ,  H04B7/26 ,  H04W16/24

公开(公告)号：MX146540A

公开(公告)日：1982-07-07

申请号：MX17304178

申请日：1978-04-07

Applicant: MOTOROLA INC

Inventor： CRAIG TIMOTHY PHILIP ,  STIMPLE JAMES ROY

IPC: H04B7/08 ,  H01Q3/24 ,  H04B7/10 ,  H04B7/26

Abstract: SECTORED ANTENNA RECEIVING SYSTEM A plurality of horizontally directive antenna sectors are arranged in configuration to receive signals from remote transmitters over a given angle in the horizontal plane. A scanning system is operative in one of several modes to sequentially couple each sector to a receiver. In its first mode, each sector is sequentially scanned with the output signal level therefrom being compared to a reference level. If the signal level on any sector exceeds the reference level the scanner activates to its second mode wherein scanning continues for a predetermined interval. At the end of the interval, scanning is inhibited and the receiver is coupled to that sector which produced the strongest signal level during the second mode scanning cycle. In the inhibit scan mode, if the signal level from the sector falls to a minimum level for a given time period the system reverts to the first scanning mode.

公开(公告)号：AU3543978A

公开(公告)日：1979-11-22

申请号：AU3543978

申请日：1978-04-26

Applicant: MOTOROLA INC

Inventor： STIMPLE JAMES ROY ,  ERICKSON PAUL MILTON

IPC: H01Q3/24 ,  H04B7/02 ,  H04B7/10 ,  H04B7/08

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.

公开(公告)号：AU3543878A

公开(公告)日：1979-11-01

申请号：AU3543878

申请日：1978-04-26

Applicant: MOTOROLA INC

Inventor： CRAIG TIMOTHY PHILIP ,  STIMPLE JAMES ROY

IPC: H01Q3/24 ,  H04B7/08 ,  H04B7/10 ,  H04B7/26

Abstract: SECTORED ANTENNA RECEIVING SYSTEM A plurality of horizontally directive antenna sectors are arranged in configuration to receive signals from remote transmitters over a given angle in the horizontal plane. A scanning system is operative in one of several modes to sequentially couple each sector to a receiver. In its first mode, each sector is sequentially scanned with the output signal level therefrom being compared to a reference level. If the signal level on any sector exceeds the reference level the scanner activates to its second mode wherein scanning continues for a predetermined interval. At the end of the interval, scanning is inhibited and the receiver is coupled to that sector which produced the strongest signal level during the second mode scanning cycle. In the inhibit scan mode, if the signal level from the sector falls to a minimum level for a given time period the system reverts to the first scanning mode.

公开(公告)号：DE2815665A1

公开(公告)日：1978-11-09

申请号：DE2815665

申请日：1978-04-11

Applicant: MOTOROLA INC

Inventor： STIMPLE JAMES ROY ,  ERICKSON PAUL MILTON

IPC: H01Q3/24 ,  H04B7/02 ,  H04B7/10 ,  H04B7/08 ,  H04B7/26

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.