公开(公告)号：CA2191817C

公开(公告)日：2000-06-27

申请号：CA2191817

申请日：1996-12-02

Applicant: MOTOROLA INC

Inventor： THOMPSON DAVID C ,  HASSEMER BRIAN J ,  KIM JIN D

IPC: H04B1/40 ,  H01Q1/24 ,  H01Q9/36 ,  H01Q11/08 ,  H04B1/04 ,  H04B1/18 ,  H04B1/38 ,  H04Q7/32

Abstract: A wireless communication device (20) provides a matching state between a radio circuit (28) and an antenna assembly (26) in both its retracted and extended positions and does so with an elegant design that increases reliability and manufacturability by reducing the number and complexity of components and moving mechanical parts. A matching circuit (30), which is reconfigured according to a switch (32) that is responsive to the antenna's position, provides the matching states.

公开(公告)号：CA2184878C

公开(公告)日：2000-06-27

申请号：CA2184878

申请日：1996-09-05

Applicant: MOTOROLA INC

Inventor： THOMPSON DAVID C ,  KIM JIN D ,  POWLES JON J

IPC: H01Q1/10 ,  H01Q1/24 ,  H01Q1/36 ,  H01Q9/32 ,  H01Q11/08 ,  H04B1/38

Abstract: A retractable antenna assembly (206; 900) provides a substantially matched antenna impedance to a matching circuit (712) of a radiotelephone (200) whether the retractable antenna assembly is in the extended position or the retracted position. In one embodiment parts (304,312) of a capacitor (714) are integrally formed on an upper portion of the retractable antenna assembly (206) such that when in the retracted position the capacitor (714) contributes to the overall antenna impedance. In another embodiment a capacitor (1302) is integrally formed on the lower portion of the retractable antenna assembly (900).

公开(公告)号：DE19534192C2

公开(公告)日：1999-06-24

申请号：DE19534192

申请日：1995-09-14

Applicant: MOTOROLA INC

Inventor： THOMPSON DAVID C ,  VANNATTA LOUIS J

IPC: H01Q1/38 ,  H01Q1/08 ,  H01Q1/24 ,  H04B1/38 ,  H04B7/26 ,  H01Q1/22 ,  H04M1/02

Abstract: A radio communication device a first housing portion (101) and second housing portion (103). The second housing portion is movably supported on the first housing portion to move between an extended position and a collapsed position. The second housing portion projects outwardly from the first housing portion in the open position. An antenna (107) is positioned in the second housing portion, the antenna includes a first component (640, 749, 859, 969) having a first tuning characteristic and a second component (647, 748, 858, 968) having a second tuning characteristic. One of the antenna components is tuned for a preferred characteristic when the radio telephone is collapsed and the other of the antenna components is tuned to the preferred characteristic when the antenna is extended.

公开(公告)号：BR9604323A

公开(公告)日：1998-06-16

申请号：BR9604323

申请日：1996-09-27

Applicant: MOTOROLA INC

Inventor： KIM JIN D ,  POWLES JON J ,  THOMPSON DAVID C

IPC: H01Q1/10 ,  H01Q1/24 ,  H01Q1/36 ,  H01Q9/32 ,  H01Q11/08 ,  H04B1/38

Abstract: A retractable antenna assembly provides a substantially matched antenna impedance to a matching circuit (712) of a radiotelephone (200) whether the retractable antenna assembly is in the extended position or the retracted position. In one embodiment parts (304, 312) of a capacitor (714) are integrally formed on an upper portion of the retractable antenna assembly (206) such that when in the retracted position the capacitor (714) contributes to the overall antenna impedance. In another embodiment a capacitor (1302) is integrally formed on the lower portion of the retractable antenna assembly (900).

公开(公告)号：GB2305782A

公开(公告)日：1997-04-16

申请号：GB9619773

申请日：1996-09-23

Applicant: MOTOROLA INC

Inventor： THOMPSON DAVID C ,  KIM JIN DONG ,  POWLES JON J

IPC: H01Q1/10 ,  H01Q1/24 ,  H01Q1/36 ,  H01Q9/32 ,  H01Q11/08 ,  H04B1/38

Abstract: A retractable antenna assembly 206 for a radio telephone provides a matched antenna impedance to a circuit in both extended and retracted positions. The antenna comprises a helical element 302 which is in direct electrical contact with the linear element. Parts of a capacitor 304, 312 are formed integrally on the linear portion of the antenna such that when the antenna is in a retracted position the capacitor contributes to the overall antenna impedance. The antenna may be housed in a grounded conductive sheath when in a retracted position. The use of a ground plane is also disclosed.

公开(公告)号：BR9504679A

公开(公告)日：1996-10-08

申请号：BR9504679

申请日：1995-09-15

Applicant: MOTOROLA INC

Inventor： THOMPSON DAVID C ,  VANNATTA LUIS J

IPC: H01Q1/38 ,  H01Q1/08 ,  H01Q1/24 ,  H04B1/38 ,  H04B7/26 ,  H04Q7/32

Abstract: A radio communication device a first housing portion (101) and second housing portion (103). The second housing portion is movably supported on the first housing portion to move between an extended position and a collapsed position. The second housing portion projects outwardly from the first housing portion in the open position. An antenna (107) is positioned in the second housing portion, the antenna includes a first component (640, 749, 859, 969) having a first tuning characteristic and a second component (647, 748, 858, 968) having a second tuning characteristic. One of the antenna components is tuned for a preferred characteristic when the radio telephone is collapsed and the other of the antenna components is tuned to the preferred characteristic when the antenna is extended.

公开(公告)号：BR9504677A

公开(公告)日：1996-10-08

申请号：BR9504677

申请日：1995-09-15

Applicant: MOTOROLA INC

Inventor： VANNATTA LOUIS J ,  THOMPSON DAVID C ,  PHILLIPS JAMES P

IPC: H01Q1/08 ,  H01Q1/24 ,  H04Q7/32

Abstract: A radio communication device (100) includes radio frequency circuitry (415) positioned in the first housing portion (101). A second housing portion (103) is movably supported on the first housing portion to move between an extended open position and a collapsed position, the second housing portion projecting outwardly from the first housing portion in the open position. An antenna assembly (107) is positioned in the second housing portion. The antenna assembly includes an antenna conductor (542) and a flexible ground member (544), the ground member positioned between the antenna conductor and the radio frequency circuitry when the first and second housing portions are in the collapsed position.

公开(公告)号：DE19532925A1

公开(公告)日：1996-03-28

申请号：DE19532925

申请日：1995-09-06

Applicant: MOTOROLA INC

Inventor： VANNATTA LOUIS J ,  THOMPSON DAVID C ,  PHILLIPS JAMES P

IPC: H01Q1/08 ,  H01Q1/24 ,  H01Q1/22 ,  H04B1/38

Abstract: A radio communication device 100 includes radio frequency circuitry (415 Fig 4 not shown) positioned in the first housing portion 101. A second housing portion 103 is movably supported on the first housing portion to move between an extended open position and a collapsed position, the second housing portion projecting outwardly from the first housing portion in the open position. An antenna assembly (107) is positioned in the second housing portion. The antenna assembly included an antenna conductor (542 Fig 8 not shown) and a flexible ground member (54 Fig 8), the ground member positioned between the antenna conductor and the radio frequency circuitry when the first and second housing portions are in the collapsed position. This avoids adverse effects on the collapsed antenna performance for a standy mode of operation.

公开(公告)号：GB2293278A

公开(公告)日：1996-03-20

申请号：GB9518821

申请日：1995-09-14

Applicant: MOTOROLA INC

Inventor： THOMPSON DAVID C ,  VANNATTA LOUIS JAY

IPC: H01Q1/38 ,  H01Q1/08 ,  H01Q1/24 ,  H04B1/38 ,  H04B7/26

Abstract: A radio communication device a first housing portion (101) and second housing portion (103). The second housing portion is movably supported on the first housing portion to move between an extended position and a collapsed position. The second housing portion projects outwardly from the first housing portion in the open position. An antenna (107) is positioned in the second housing portion, the antenna includes a first component (640, 749, 859, 969) having a first tuning characteristic and a second component (647, 748, 858, 968) having a second tuning characteristic. One of the antenna components is tuned for a preferred characteristic when the radio telephone is collapsed and the other of the antenna components is tuned to the preferred characteristic when the antenna is extended.

公开(公告)号：FR2724793B1

公开(公告)日：2000-12-01

申请号：FR9510704

申请日：1995-09-13

Applicant: MOTOROLA INC

Inventor： THOMPSON DAVID C ,  VANNATTA LOUIS J

IPC: H01Q1/38 ,  H01Q1/08 ,  H01Q1/24 ,  H04B1/38 ,  H04B7/26 ,  H01Q23/00

Abstract: A radio communication device a first housing portion (101) and second housing portion (103). The second housing portion is movably supported on the first housing portion to move between an extended position and a collapsed position. The second housing portion projects outwardly from the first housing portion in the open position. An antenna (107) is positioned in the second housing portion, the antenna includes a first component (640, 749, 859, 969) having a first tuning characteristic and a second component (647, 748, 858, 968) having a second tuning characteristic. One of the antenna components is tuned for a preferred characteristic when the radio telephone is collapsed and the other of the antenna components is tuned to the preferred characteristic when the antenna is extended.