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41. 发明专利

JP2004128600A Variable-directivity dielectric antenna 审中-公开
公开(公告)号：JP2004128600A
公开(公告)日：2004-04-22
申请号：JP2002286312
申请日：2002-09-30
申请人： Toko Inc , 東光株式会社
发明人： NAKAMURA TADASHI
IPC分类号： H01Q19/32 , H01Q3/22 , H01Q3/24 , H01Q3/44 , H01Q9/40 , H01Q13/08
摘要： PROBLEM TO BE SOLVED: To provide a monopole variable-directivity dielectric antenna which has a passive element set to take an optimum resonance frequency when it acts as either a reflector or a waveguide, and is changeable to either of them.
SOLUTION: The variable-directivity dielectric antenna has one radiation element and at least a passive element acting as a reflector or a waveguide. The passive element disposed around the radiation element has the same structure as the radiation element, i.e., a distributed-constant line acting as an reactive element is connected in series to a matched terminal pin with the other end electrically open or connected to a ground pattern on a ground plate, and a switch element is connected to its middle position. The distributed-constant line is set to a length ensuring an optimum resonance frequency of either the waveguide or the reflector, and the switch connecting position at its middle is set for a length ensuring the other optimum resonance frequency. The antenna is changeable to either of them to obtain an optimum directivity.
COPYRIGHT: (C)2004,JPO

42. 发明专利

JP2002077008A ADAPTIVE ANTENNA RECEIVER 失效
公开(公告)号：JP2002077008A
公开(公告)日：2002-03-15
申请号：JP2000256549
申请日：2000-08-25
申请人： NEC CORP
发明人： YOSHIDA NAOMASA
IPC分类号： H01Q3/22 , H01Q3/26 , H04B1/707 , H04B1/712 , H04B7/02 , H04B7/08 , H04B7/10 , H04B7/26 , H04W16/28 , H04W88/08
摘要： PROBLEM TO BE SOLVED: To stabilize adaptive control by immediately changing a reference signal depending on a received level. SOLUTION: Beam formers 1-1 to 1-L receive a signal subjected to inverse spread processing through the use of a spread code of a desired user in each path timing and apply complex weight synthetic to the signal to form a directed beam by each path. Adaptive control means 7-1 to 7-L use an error signal and the received signal by each antenna to obtain each antenna weight coefficient used by the beam formers 1-1 to 1-L through adaptive control. Reception level detection means 8-1 to 8-L detect a reception level by each path based on a transmission path estimate value by each antenna and an adder 9 sums the reception levels of the paths. A multiplier 5 multiplies the sum signal with a known reference signal or a discrimination signal, and a subtractor 6 subtracts each received signal from the product and gives the difference to the adaptive control means 7-1 to 7-L as the error signal.

43. 发明专利

JP2747239B2 失效
公开(公告)号：JP2747239B2
公开(公告)日：1998-05-06
申请号：JP6921695
申请日：1995-03-28
申请人： NIPPON DENKI IDO TSUSHIN KK
发明人： MATSUMOTO KAZUO
IPC分类号： H01Q3/22 , H04B1/04 , H04W4/04 , H04W16/28 , H04Q7/36

44. 发明专利

JP2640026B2 失效
公开(公告)号：JP2640026B2
公开(公告)日：1997-08-13
申请号：JP24484490
申请日：1990-09-14
申请人： DEIETSUKUSU ANTENA KK
发明人： SHIROSAKA TOSHIAKI
IPC分类号： H01Q3/22 , G01S3/16 , G01S3/42 , H01Q25/00

45. 发明专利

JPH07209359A ELECTRON SCANNING MICROWAVE RADIOMETER 失效
公开(公告)号：JPH07209359A
公开(公告)日：1995-08-11
申请号：JP78094
申请日：1994-01-10
申请人： MITSUBISHI ELECTRIC CORP
发明人： TANAKA HIROKAZU
IPC分类号： G01V3/16 , G01R29/08 , G01S7/02 , H01Q1/28 , H01Q3/22 , H01Q3/24 , H01Q21/06
摘要： PURPOSE:To realize a single region operation on the surface of the globe in a conical shape at a predetermined fixed incident angle by providing a cylindrical one-dimensional phased array antenna for receiving microwave noise from the surface of the globe. CONSTITUTION:Microwave noise radiated from an object on the surface of the globe is received by an m.N sub-array in a cylindrical one-dimensional phased array antenna 1 comprising M.N radiation element array of a microwave radiometer mounted on a satellite. The radiation element array of the antenna 1 comprises M element arranged in the scanning direction and N elements arranged perpendicularly thereto and the m.N sub-array is selected by means of a sub-array selection switch 7. Since the radiation element array is arranged cylindrically in the scanning direction, conical single region operation on the surface of the globe can be realized by switching the sub-array sequentially.

46. 发明专利

JPH0669713A PHASING FREQUENCY STEERING-TYPE ANTENNA 失效
公开(公告)号：JPH0669713A
公开(公告)日：1994-03-11
申请号：JP41932790
申请日：1990-12-28
申请人： TEXAS INSTRUMENTS INC
发明人： SUTANRII BUI BAARESON
IPC分类号： G01S7/02 , H01Q3/22 , H01Q3/26
摘要： PURPOSE: To enable instantaneous band width performance corresponding to a phase steering type antenna, to remarkably decrease the number of phase shifter elements and to avoid the remarkable increase of side lobe level or the considerable degradation of angle accuracy. CONSTITUTION: This antenna includes a linear array 10 of phase shift/time delay modules 22-25 and the module is respectively provided with a phase shift element PSE having a phase shifter PS and several time delay elements TDE connected through respective time delay feeders TDF to the phase shifter PS. According to a usual antenna pattern weighing system, these phase shifters are centralized at the central part of array 10, the number of time delay elements in the phase shift/time delay module is more increased for the module positioned much closer to the terminal part of array and thus, the desired 'dispersion' of phase shifters is performed. The phase shifters of respective phase shift/time delay modules are cooperatively settled at a scanning frequency.

47. 发明专利

JPH01502068A 失效
公开(公告)号：JPH01502068A
公开(公告)日：1989-07-13
申请号：JP50047788
申请日：1987-11-23
IPC分类号： H01Q19/17 , H01Q3/22 , H01Q3/40 , H01Q25/00 , H04B7/204

48. 发明专利

JPS6393204A SERIES FEEDING CIRCUIT 失效
公开(公告)号：JPS6393204A
公开(公告)日：1988-04-23
申请号：JP23885186
申请日：1986-10-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： ISHIDA OSAMI , ISODA YOJI , MIYAZAKI MORIYASU , TAKEUCHI NORIO
IPC分类号： H01Q3/22 , H01Q21/06 , H01Q21/08
摘要： PURPOSE:To suppress the degradation of VSWR by connecting >=three first series feeding circuits, which have a small number of distribution output terminals, to distribution output terminals of a second series feeding circuit to constitute a series feeding circuit having a large number of distribution output terminals. CONSTITUTION:Couplers 11-19 are cascaded through a first lines 31-36 to constitute three first series feeding circuits 1-3 each of which has a small number of distribution output terminals. Couplers 20 and 21 are cascaded through a second line 37 whose line length is three times as long as lines 31-36, and they constitute the second feeding circuit 4 together with a second line 38. Circuits 1-3 are connected to distribution output terminals P10-P12 of the circuit 4 to constitute a series feeding circuit having 9 distribution output terminals. Since circuits 1-3 are connected through couplers 20 and 21, reflected waves of circuits 1-3 are not superposed, and the degradation of VSWR is controlled when the series feeding circuit having a large number of distribution output terminals is constituted.

49. 发明专利

JPS58103206A ARRAY ANTENNA DEVICE 失效
公开(公告)号：JPS58103206A
公开(公告)日：1983-06-20
申请号：JP20292581
申请日：1981-12-15
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAWADA YASUJI
IPC分类号： H01Q3/22 , H01Q25/02
摘要： PURPOSE:To prevent both deterioration of gain and null shift of a differential pattern, by using a hybrid coupler to a directional coupler that has a coupling degree to compensate a power loss due to a difference of the delay line lengths. CONSTITUTION:The difference of power loss between the delay line (3-2)(3-3) of a group B and the delay line (3-1) of a group A, i.e. the power loss of the 2nd line (3-3) is set at DELTALdB. In such case, the coupling degree CAdB between the terminal SIGMA of a directional coupler 6 and the line (3-3) is set so as to satisfy the equation 1. Thus the electric power to be distributed to the group B through the terminal SIGMA is larger than the electric power to be distributed to the group A by an amount of DELTALdB. Therefore the electric wave supplied through the terminal SIGMA is divided into two parts. Then the electric power obtained when the divided electric waves reach a coupler (2-1) for radiator is equal to the electric power obtained when the divided electric waves reach a coupler (2-3) for radiator. Therefore the levels of the amplitude distributions coincide with each other at the boundary between the groups A and B. This can prevent the occurrence of a null shift of a differential pattern as well as the deterioration of gain.

50. 实用新型

JPS5871271U 失效
公开(公告)号：JPS5871271U
公开(公告)日：1983-05-14
申请号：JP16614381
申请日：1981-11-06
IPC分类号： H01Q3/22 , H04N5/64

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