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公开(公告)号：US06429823B1
公开(公告)日：2002-08-06
申请号：US09637341
申请日：2000-08-11
IPC分类号： H01Q1910
CPC分类号： H01Q19/062 , H01Q1/288 , H01Q3/46 , H01Q19/10
摘要： In summary the present invention discloses a horn reflect array antenna system and a method for producing a signal using a horn reflect array antenna. The system comprises at least one reflective element illuminated by an incident radio frequency (RF) signal from a feed horn, the reflective element reflecting a portion of the incident RF signal as a portion of a reflected RF signal, and at least one phase shifting device, each phase shifting device coupled to a corresponding reflective element, wherein a beam pattern of the reflected RF signal is altered when the phase shifting element changes the phase of the portion of the reflected RF signal. A method in accordance with the present invention comprises illuminating a reflector with an RF signal emanating from a feed horn, wherein the reflector comprises at least one reflective element, reflecting at least a portion of the RF signal from the reflective element, wherein the reflective element comprises a phase shifting device, and changing a phase of the portion of the reflected RF signal with the phase shifting device, therein altering the radiation pattern of the reflected RF signal.
摘要翻译： 总之，本发明公开了一种喇叭反射阵列天线系统和使用喇叭反射阵列天线产生信号的方法。 该系统包括由来自馈电喇叭的入射射频（RF）信号照射的至少一个反射元件，反射元件将入射RF信号的一部分反射为反射RF信号的一部分，以及至少一个相移装置 每个相移装置耦合到对应的反射元件，其中当相移元件改变反射RF信号的该部分的相位时，反射的RF信号的波束图案被改变。 根据本发明的方法包括用从馈电喇叭发射的RF信号照射反射器，其中反射器包括至少一个反射元件，反射来自反射元件的RF信号的至少一部分，其中反射元件 包括相移装置，并且用相移装置改变反射RF信号的该部分的相位，改变反射RF信号的辐射图。
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公开(公告)号：US4998113A
公开(公告)日：1991-03-05
申请号：US370659
申请日：1989-06-23
摘要： A horn radiator assembly includes two horn radiators each of which is formed as a conical horn and a waveguide of constant cross section connected to the small end of the horn as a feed and providing a signal port. The first of the horn radiators is of relatively large cross section and serves to radiate electromagnetic waves at a relatively low frequency. The second of the horn radiators is of relatively small cross section and serves to radiate electromagnetic waves at a relatively high frequency. The second radiator is nested within the first radiator, and is positioned with its radiating aperture coplanar with the radiating aperture of the first radiator. In the second radiator, the waveguide feed is provided with a bend allowing the waveguide feed to pass through a wall of the first radiator. A strut may be affixed to the bend to provide a symmetrical transverse support within the first radiator for the second radiator. A doubly-tapered electrically conductive sheet extends from an apex within the throat of the first radiator horn to the transverse support, and from there tapers back to contact the horn of the second radiator. The tapered sheet guides low-frequency radiation past the strut and the bend to minimize standing wave ratio.
摘要翻译： 喇叭辐射器组件包括两个喇叭辐射器，每个喇叭辐射器形成为圆锥形喇叭，恒定横截面波导连接到喇叭的小端作为馈电并提供信号端口。 喇叭辐射器中的第一个具有较大的横截面，用于以较低的频率辐射电磁波。 第二个喇叭辐射器的横截面相对较小，用于以较高的频率辐射电磁波。 第二散热器嵌套在第一散热器内，并且其辐射孔定位成与第一散热器的辐射孔共面。 在第二散热器中，波导进料设置有允许波导进给通过第一辐射器的壁的弯曲。 支柱可以固定到弯曲部以在第一辐射器内为第二辐射器提供对称的横向支撑。 双锥形导电片从第一散热器喇叭的喉部中的顶点延伸到横向支撑件，并且从那里逐渐变细以接触第二散热器的喇叭。 锥形片引导低频辐射穿过支柱和弯曲，以最小化驻波比。
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公开(公告)号：US5038150A
公开(公告)日：1991-08-06
申请号：US522752
申请日：1990-05-14
申请人： Paramjit S. Bains
发明人： Paramjit S. Bains
CPC分类号： H01Q25/001
摘要： A feed network for an antenna system, e.g., a phased array antenna system, which is operatively associated with a signal source, e.g., satellite-based transponders, which generates first and second R.F. signals of circular polarization, and third and fourth R.F. signals of orthogonal linear polarizations. The feed network includes a 3dB hybrid coupler or the like for splitting each of the first and second R.F. signals into first and second signal components disposed in phase quadrature with each other. Facilities are provided for applying the first signal components of the first and second R.F. signals, and the third R.F. signal, to a first beam forming network (BFN); and, for separately applying the second signal components of the first and second R.F. signals, and the fourth R.F. signal, to a second BFN. Subsequent to their emergence from the BFN's, the first and second signal components of each of the first and second R.F. signals are applied to respective through and side ports of ortho-mode-tees (OMT's) which Function to re-combine the first and second signal components, in phase quadrature, in order to thereby produce output first and second R.F. signals of opposite-sense (i.e., dual) circular polarizations. The third and fourth R.F. signals pass unaffected through the OMT's as output third and fourth R.F. signals of orthogonal (i.e., dual) linear polarizations. The first, second, third, and fourth output R.F. signals are then fed through common transmission lines to excite the individual antenna elements of the antenna system.
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公开(公告)号：US4972199A
公开(公告)日：1990-11-20
申请号：US331422
申请日：1989-03-30
CPC分类号： H01Q25/001 , H01Q19/17 , H01Q5/45
摘要： An antenna is constructed of an array of contiguous circular cylindrical radiators each of which extends forwardly of a radiator assembly producing two circularly polarized waves of opposite direction of rotation of their respective electric fields. The radiators measure one wavelength at the transmit frequency band, and approximately 1.5 wavelengths in diameter at the receive frequency band. A section of cylindrical waveguide in the back of each radiator assembly encloses a microwave structure for generating the circularly polarized waves, the microwave structure including an orthomode transducer at the back of the assembly and an electric field rotator disposed forward of the orthomode transducer. In each radiator assembly, there is disposed between the rotator and the radiator a transition between smaller diameter waveguide to larger diameter waveguide. The transition may have the form of a step or a flare for a more gradual transition. The transducer produces a higher order TM.sub.11 mode which is evanescent within the radiator 24. By attenuating the transverse magnetic mode, a match is made between electric field components thereof and those of curved electric fields of the dominant propagating modes to cancel curvature and reduce cross polarization between the two circularly polarized waves in each radiator.
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