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1. 发明授权

US5896108A Microstrip line fed microstrip end-fire antenna 失效
标题翻译：微带线馈送微带端射天线
公开(公告)号：US5896108A
公开(公告)日：1999-04-20
申请号：US889477
申请日：1997-07-08
申请人： Lotfollah Shafai
发明人： Lotfollah Shafai
IPC分类号： H01Q1/38 , H01Q19/32 , H01Q21/12
CPC分类号： H01Q21/12 , H01Q1/38 , H01Q19/32
摘要： An end fire microstrip antenna which is particularly suitable for low-profile applications comprises a dielectric substrate having a first surface and an opposite surface. A driven element, a microstrip fedline and a plurality of (parasitic) director elements are provided on the first surface. These elements extend in the same plane and are spaced apart from each other in a longitudinal or end-fire direction of the antenna. Likewise, the director elements are spaced apart from each other in arrow extending in the end-fire direction. The antenna further comprises a ground plane provided on the second surface. The driven element comprises a conductive strip connected at one end to the microstrip feedline and open-circuit at its opposite end. It has at least one undulation in such same plane. The undulation has at least one limb extending transversely to the end-fire direction. A conductive reflector element may be provided behind the driven element. The director elements may comprise dipoles or patches and may be equal in width and uniformly spaced. Alternatively, the width and/or spacing may vary according to the distance from the driven element. A plurality of the antennas may be assembled as an array and operated to provide a single beam or a plurality of individual beams.
摘要翻译：特别适用于低轮廓应用的终端微带天线包括具有第一表面和相对表面的电介质基片。驱动元件，微带馈线和多个（寄生）导向器元件设置在第一表面上。这些元件在同一平面上延伸并且在天线的纵向或端射方向上彼此间隔开。类似地，导向器元件在端部火焰方向上延伸的箭头彼此间隔开。天线还包括设置在第二表面上的接地平面。从动元件包括一端连接到微带馈线并在其相对端开路的导电条。它在同一平面上至少有一个起伏。起伏具有至少一个横向于端射方向延伸的肢体。可以在驱动元件后面设置导电反射器元件。导向元件可以包括偶极子或贴片，并且可以在宽度上均匀间隔开。或者，宽度和/或间隔可以根据与被驱动元件的距离而变化。多个天线可以组装成阵列并被操作以提供单个波束或多个单独波束。

2. 发明申请

US20050179592A1 Multiple frequency antenna 有权
标题翻译：多频天线
公开(公告)号：US20050179592A1
公开(公告)日：2005-08-18
申请号：US10509099
申请日：2003-03-28
申请人： Lotfollah Shafai , Cyrus Shafai
发明人： Lotfollah Shafai , Cyrus Shafai
IPC分类号： H01Q1/24 , H01Q1/38 , H01Q5/00 , H01Q9/04
CPC分类号： H01Q9/0407 , H01Q1/243 , H01Q1/48 , H01Q9/0442
摘要： An antenna having a resonant structure, comprises an antenna element (11) and an adjacent electrode (17A) and control means (22,25) for changing a resonance frequency of the antenna element. The control means may comprise a conductive membrane (17A) spaced from the antenna element. The resonance frequency then is changed by flexing the membrane, conveniently by applying a potential difference between the membrane and an adjacent control electrode.
摘要翻译：具有共振结构的天线包括天线元件（11）和相邻电极（17A）和用于改变天线元件的谐振频率的控制装置（22,25）。控制装置可以包括与天线元件间隔开的导电膜（17A）。然后通过弯曲膜来改变共振频率，方便地通过在膜和相邻的控制电极之间施加电位差。

3. 发明授权

US4982198A High performance dipole feed for reflector antennas 失效
标题翻译：反射天线的高性能偶极馈电
公开(公告)号：US4982198A
公开(公告)日：1991-01-01
申请号：US349463
申请日：1989-05-09
申请人： Lotfollah Shafai , Prakash Bhartia
发明人： Lotfollah Shafai , Prakash Bhartia
IPC分类号： H01Q19/19
CPC分类号： H01Q19/193
摘要： A dipole feed for a paraboloidal reflector antenna uses a conical reflector to direct the radiation of the dipole towards the concave reflecting surface of the parabola. The size and apex angle of the conical reflector are optimized to yield the desired feed pattern, the optimization parameters depending on the reflector size and focal length and being obtained numerically or experimentally to maximize reflector gain.
摘要翻译：用于抛物面反射器天线的偶极馈电使用锥形反射器将偶极子的辐射引向抛物线的凹面反射表面。锥形反射器的尺寸和顶角被优化以产生期望的馈送图案，优化参数取决于反射器尺寸和焦距，并且通过数字或实验获得以使反射器增益最大化。

4. 发明授权

US4516129A Waveguide with dielectric coated flange antenna feed 失效
标题翻译：带介质涂层法兰天线馈电的波导
公开(公告)号：US4516129A
公开(公告)日：1985-05-07
申请号：US385251
申请日：1982-06-04
申请人： Apisak Ittipiboon , Lotfollah Shafai , Ernest Bridges
发明人： Apisak Ittipiboon , Lotfollah Shafai , Ernest Bridges
IPC分类号： H01Q13/06 , H01Q13/00
CPC分类号： H01Q13/065
摘要： The antenna feed includes a waveguide radiator with a conductive flange positioned about the waveguide near its radiating end. A dielectric element is positioned about the waveguide between the flange and the radiating end and establishes the dielectric surface impedance seen by the waveguide. The dielectric element may consist of one or more layers of dielectric material to form a composite dielectric. One of the layers may be an air gap adjacent to the flange. The size and position of the flange and dielectric element will control the radiation pattern of the beam from the feed.
摘要翻译：天线馈送包括波导辐射器，导电凸缘围绕其辐射端附近的波导定位。电介质元件围绕波导在凸缘和辐射端之间定位，并建立由波导看到的电介质表面阻抗。电介质元件可以由一层或多层电介质材料组成以形成复合电介质。层中的一个可以是与凸缘相邻的气隙。凸缘和介质元件的尺寸和位置将控制来自进料的梁的辐射图。

5. 发明授权

US09448187B2 Imaging using probes 有权
标题翻译：使用探针成像
公开(公告)号：US09448187B2
公开(公告)日：2016-09-20
申请号：US14127288
申请日：2012-06-26
申请人： Majid Ostadrahimi , Joe Lovetri , Lotfollah Shafai
发明人： Majid Ostadrahimi , Joe Lovetri , Lotfollah Shafai
IPC分类号： A61B5/05 , G01S13/89 , G01N22/00 , A61B5/00 , G01S13/00
CPC分类号： G01N22/00 , A61B5/0507 , G01S13/89
摘要： Methods and systems may image an object of interest using one or more probes. More specifically, such exemplary methods and systems may deliver electromagnetic energy (e.g., microwave energy) using a transmitting antenna to the object while activating a probe to interact with the scattered field and sampling the resulting scattered field using one or more receiving antennas. The sampled electromagnetic energy may then be used to reconstruct an image of the object.
摘要翻译：方法和系统可以使用一个或多个探针对感兴趣的对象进行成像。更具体地，这样的示例性方法和系统可以使用发射天线将电磁能（例如，微波能量）传送到物体，同时激活探头以与散射场相互作用，并使用一个或多个接收天线对所得到的散射场进行采样。然后，采样的电磁能可用于重构物体的图像。

6. 发明申请

US20070074580A1 SENSING SYSTEM BASED ON MULTIPLE RESONANT ELECTROMAGNETIC CAVITIES 有权
标题翻译：基于多个谐振电磁场的感应系统
公开(公告)号：US20070074580A1
公开(公告)日：2007-04-05
申请号：US11531174
申请日：2006-09-12
申请人： Mehran Fallah-Rad , Douglas Thomson , Gregory Bridges , Lotfollah Shafai
发明人： Mehran Fallah-Rad , Douglas Thomson , Gregory Bridges , Lotfollah Shafai
IPC分类号： G01M5/00
CPC分类号： G01M5/0008 , G01M5/0033 , G01M5/0091
摘要： A system and a method for measuring properties and health of structures are disclosed. The system comprises a number of sensors connected to a single antenna. Each sensor has a body that defines an electromagnetic resonator. The electromagnetic resonator produces a response signal in response to an interrogation signal. The body is coupled to the structure to so as to allow the parameters of interest alter the resonance properties of the electromagnetic resonators thereby altering the response signal. The sensor further includes a coupler that is coupled to the body. The coupler transfers the interrogation signal into the electromagnetic resonator and transfers the response signal from the electromagnetic resonator. The system further includes an interrogator that generates and transmits the interrogation signal to the sensor. The interrogator also receives the response signal.
摘要翻译：公开了一种用于测量结构的性质和健康的系统和方法。该系统包括连接到单个天线的多个传感器。每个传感器具有限定电磁谐振器的主体。电磁谐振器响应于询问信号产生响应信号。主体耦合到结构以允许感兴趣的参数改变电磁谐振器的谐振特性，从而改变响应信号。该传感器还包括耦合器，该耦合器耦合到主体。耦合器将询问信号传送到电磁谐振器，并传送来自电磁谐振器的响应信号。系统还包括询问器，其产生并传送询问信号到传感器。询问器也接收响应信号。

7. 发明授权

US4947178A Scanning antenna 失效
标题翻译：扫描天线
公开(公告)号：US4947178A
公开(公告)日：1990-08-07
申请号：US189012
申请日：1988-05-02
申请人： Lotfollah Shafai
发明人： Lotfollah Shafai
IPC分类号： H01Q1/38 , H01Q3/34 , H01Q9/04
CPC分类号： H01Q1/38 , H01Q3/34 , H01Q9/0414
摘要： A novel scanning array antenna is provided with improved gain characteristic which enable a compact form to be employed. The resonant azimuthal modes of separate antenna elements are selected to satisfy certain mathematical relationships which, in effect, form a directional beam which can be steered by a relatively small number of phase shifters. An example of antenna structure is an array of circular microstrip patch in the form of concentric disks each in resonance at one of the azimuthal modes under the disk cavity.
摘要翻译：提供了一种新颖的扫描阵列天线，其具有改进的增益特性，使得能够采用紧凑的形式。选择单独天线元件的谐振方位模式以满足某些数学关系，其实际上形成可由相对较少数量的移相器转向的定向波束。天线结构的一个例子是以同心盘形式的圆形微带贴片阵列，它们各自在盘腔下的方位模式之一处共振。

8. 发明申请

US20140218230A1 IMAGING USING PROBES 有权
标题翻译：使用探索成像
公开(公告)号：US20140218230A1
公开(公告)日：2014-08-07
申请号：US14127288
申请日：2012-06-26
申请人： Majid Ostadrahimi , Joe Lovetri , Lotfollah Shafai
发明人： Majid Ostadrahimi , Joe Lovetri , Lotfollah Shafai
IPC分类号： G01N22/00
CPC分类号： G01N22/00 , A61B5/0507 , G01S13/89
摘要： Methods and systems may image an object of interest using one or more probes. More specifically, such exemplary methods and systems may deliver electromagnetic energy (e.g., microwave energy) using a transmitting antenna to the object while activating a probe to interact with the scattered field and sampling the resulting scattered field using one or more receiving antennas. The sampled electromagnetic energy may then be used to reconstruct an image of the object.
摘要翻译：方法和系统可以使用一个或多个探针对感兴趣的对象进行成像。更具体地，这样的示例性方法和系统可以使用发射天线将电磁能（例如，微波能量）传送到物体，同时激活探头以与散射场相互作用，并使用一个或多个接收天线对所得到的散射场进行采样。然后，采样的电磁能可用于重构物体的图像。

9. 发明授权

US07441463B2 Sensing system based on multiple resonant electromagnetic cavities 有权
标题翻译：基于多谐振电磁腔的感应系统
公开(公告)号：US07441463B2
公开(公告)日：2008-10-28
申请号：US11531174
申请日：2006-09-12
申请人： Mehran Fallah-Rad , Douglas John Thomson , Gregory Ernest John Bridges , Lotfollah Shafai
发明人： Mehran Fallah-Rad , Douglas John Thomson , Gregory Ernest John Bridges , Lotfollah Shafai
IPC分类号： G01B7/16 , G01L1/00
CPC分类号： G01M5/0008 , G01M5/0033 , G01M5/0091
摘要： A system and a method for measuring properties and health of structures are disclosed. The system comprises a number of sensors connected to a single antenna. Each sensor has a body that defines an electromagnetic resonator. The electromagnetic resonator produces a response signal in response to an interrogation signal. The body is coupled to the structure to so as to allow the parameters of interest alter the resonance properties of the electromagnetic resonators thereby altering the response signal. The sensor further includes a coupler that is coupled to the body. The coupler transfers the interrogation signal into the electromagnetic resonator and transfers the response signal from the electromagnetic resonator. The system further includes an interrogator that generates and transmits the interrogation signal to the sensor. The interrogator also receives the response signal.
摘要翻译：公开了一种用于测量结构的性质和健康的系统和方法。该系统包括连接到单个天线的多个传感器。每个传感器具有限定电磁谐振器的主体。电磁谐振器响应于询问信号产生响应信号。主体耦合到结构以允许感兴趣的参数改变电磁谐振器的谐振特性，从而改变响应信号。该传感器还包括耦合器，该耦合器耦合到主体。耦合器将询问信号传送到电磁谐振器，并传送来自电磁谐振器的响应信号。系统还包括询问器，其产生并传送询问信号到传感器。询问器也接收响应信号。

10. 发明授权

US07180459B2 Multiple phase center feedhorn for reflector antenna 失效
标题翻译：用于反射天线的多相中心馈电喇叭
公开(公告)号：US07180459B2
公开(公告)日：2007-02-20
申请号：US10869844
申请日：2004-06-18
申请人： Bhashyam Balaji , Anthony Damini , George E. Haslam , Lotfollah Shafai , Satish Sharma
发明人： Bhashyam Balaji , Anthony Damini , George E. Haslam , Lotfollah Shafai , Satish Sharma
IPC分类号： H01Q13/00
CPC分类号： H01Q13/025 , H01Q19/12 , H01Q25/00
摘要： A feedhorn driving method and apparatus allows the establishment of multiple phase centers using only a single multimode feedhorn. At least two higher-order modes are extracted from the feedhorn and weighted in amplitude and phase. The phase center separation is established in accordance with an assigned weights. The feedhorn has application in i.a. moving target indication systems.
摘要翻译：一种反馈喇叭驱动方法和装置允许仅使用单个多模馈电喇叭建立多相位中心。从馈源喇叭提取至少两个高阶模式，并以幅度和相位进行加权。相位中心分离根据分配的权重建立。饲料原料在日本有应用移动目标指示系统。

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