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91. 发明专利

GB8607663D0 ORTHOGONAL MODE TRANSDUCER 未知
公开(公告)号：GB8607663D0
公开(公告)日：1986-04-30
申请号：GB8607663
申请日：1986-03-27
申请人： ERA PATENTS LTD
IPC分类号： H01P1/161 , H01P1/213

92. 发明专利

GB2126778B IMPROVEMENTS RELATING TO SCANNING ELECTRON AND SCANNING OPTICAL MICROSCOPES 未知
公开(公告)号：GB2126778B
公开(公告)日：1985-12-04
申请号：GB8322989
申请日：1983-08-26
申请人： ERA PATENTS LTD
发明人： MAHER EAMON FRANCIS PIUS
IPC分类号： G02B21/00 , H01J37/28 , G02B21/06

93. 发明专利

GB2151408A Cartesian corrugated horn 未知
公开(公告)号：GB2151408A
公开(公告)日：1985-07-17
申请号：GB8311466
申请日：1983-04-28
申请人： ERA PATENTS LTD
发明人： GHOSH SUBIR , WATSON BARRY KENNETH , GUPTA GHAN SHYAM
IPC分类号： H01Q13/02
摘要： A cartesian corrugated horn 1 for dominant TE10 type modes and higher order LSE11 and TE20 type modes has its corrugation slots 4 in at least the throat region 5 of the horn mode selectively loaded, for example by means of metal partitions 8 which centrally divide the slots 4 in each wall at positions midway between the ends of the slots, so that the dispersion characteristics of the TE10 and TE20 type slot modes are brought close together and the boundary impedance is made substantially equal for all of the modes. Alternatively, each slot 4 in each wall of the horn 1 in at least the throat region 5 may be loaded by means of a pair of semi-partitions of metal, or a pair of partitions of dielectric material. positioned midway between the centre and the opposite ends of the slot.

94. 发明专利

GB8501440D0 CIRCULARLY POLORIZING ANTENNA FEED 未知
公开(公告)号：GB8501440D0
公开(公告)日：1985-02-20
申请号：GB8501440
申请日：1985-01-21
申请人： ERA PATENTS LTD
IPC分类号： H01P1/17 , H01Q13/02

95. 发明专利

GB2137428A Beacon tracking system for a satellite reflector antenna 未知
公开(公告)号：GB2137428A
公开(公告)日：1984-10-03
申请号：GB8406176
申请日：1984-03-09
申请人： ERA PATENTS LTD
发明人： WATSON BARRY KENNETH , DANG NGOC DINH
IPC分类号： G01S3/32 , H01P1/16 , H01Q3/08
摘要： In an automatic cartesian coordinate beacon tracking system for a communications satellite reflector antenna the higher order TM01 and TE21 circular waveguide modes are used as the tracking modes and are both extracted from the primary waveguide 3 by a first mode coupling section 4 comprising four equiangularly spaced transverse rectangular coupling apertures 10 opening separately into four rectangular waveguide arms 11 which lead to a hybrid network 12 arranged to isolate the two tracking modes from each other and then to vectorially subtract and sum the tracking modes to derive difference channel error signals DELTA X and DELTA Y related to the pointing error of the antenna. The dominant TE11 mode at the beacon frequency is extracted from the primary waveguide 3 by a second mode coupling section 5 axially spaced from the first mode coupling section 4 and comprising four equiangularly spaced longitudinal rectangular coupling apertures 13 opening separately into four rectangular waveguide arms 14 which lead to a second hybrid network 15 arranged to derive sum channel reference signals SIGMA X and SIGMA Y respectively from the extracted components of the TE11 mode at the beacon frequency. In some cases the second mode coupling section 5 of the tracking system may be arranged to extract up link communication signals from the RF feed chain in addition to the beacon tracking signal, the second hybrid network 15 being suitably designed to separate the extracted communication and tracking signals.

96. 发明专利

GB8421278D0 CORRUGATED RECTANGULAR WAVEGUIDE HORNS 未知
公开(公告)号：GB8421278D0
公开(公告)日：1984-09-26
申请号：GB8421278
申请日：1984-08-22
申请人： ERA PATENTS LTD
IPC分类号： H01Q13/02

97. 发明专利

GB2097196B MILLIMETER WAVE ARRAYS 未知
公开(公告)号：GB2097196B
公开(公告)日：1984-09-05
申请号：GB8112466
申请日：1981-04-22
申请人： ERA PATENTS LTD
发明人： BIRAND MEHMET TUNCAY
IPC分类号： H01Q13/20 , H01Q21/00 , H01Q21/06

98. 发明专利

GB8406176D0 BEACON TRACKING SYSTEM 未知
公开(公告)号：GB8406176D0
公开(公告)日：1984-04-11
申请号：GB8406176
申请日：1984-03-09
申请人： ERA PATENTS LTD
IPC分类号： G01S3/32 , H01P1/16

99. 发明专利

GB2126778A Improvements relating to scanning electron and scanning optical microscopes 未知
公开(公告)号：GB2126778A
公开(公告)日：1984-03-28
申请号：GB8322989
申请日：1983-08-26
申请人： ERA PATENTS LTD
发明人： MAHER EAMON FRANCIS PIUS
IPC分类号： G02B21/00 , H01J37/28 , G02B21/06 , H04N5/36
摘要： A hybrid instrument operable as a scanning electron microscope (SEM) or a scanning optical microscope comprises a scanning electron microscope provided additionally with a luminescent device (12) emitting light in response to incident electrons and which is removably insertible into the scanning electron beam (3) which is focused on the device to produce light therefrom. Removable means such as a lens 14 focuses scanned light (1 5) on a specimen (4) to be studied. Usually the instrument will have at least one additional detector which is responsive to a signal from the specimen in response to the incident light beam and which is connected to the image signal processing and display system of the SEM. The luminescent device (12), the lens (14), and the detector or detectors may be carried by a conversion specimen stage which can be interchanged with the normal specimen stage of the SEM when the instrument is to be used as a scanning optical microscope. The specimen (4) may lie outside the vacuum chamber.

100. 发明专利

FR2221892B3 未知
公开(公告)号：FR2221892B3
公开(公告)日：1976-12-24
申请号：FR7408932
申请日：1974-03-15
申请人： ERA PATENTS LTD
IPC分类号： C03C17/25 , G02F1/1343 , H01B1/00 , H01J17/49 , H05B33/28 , H05B33/10

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