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1. 发明授权

US5926148A Three dimensional reconfigurable photoconductive antenna array element 失效
标题翻译：三维可重构光导天线阵元件
公开(公告)号：US5926148A
公开(公告)日：1999-07-20
申请号：US934013
申请日：1997-08-25
申请人： David Da-Wei Liu , Paul H. Carr , Steven D. Mittleman
发明人： David Da-Wei Liu , Paul H. Carr , Steven D. Mittleman
IPC分类号： H01Q3/26 , H01Q13/24 , H01Q13/00
CPC分类号： H01Q3/2676 , H01Q13/24
摘要： First and second tandemly positioned electrically biased semiconductor members radiate microwave energy in response to the receipt of an excitation light beam having two wavelengths related to the bandgaps of the members. The projected microwave beam may be made more narrow and directional if two of the members are electrically biased at the same time. An inefficient frequency doubler generates the two wavelength beam enabling a single light beam to excite both members in a simple, rugged photoconductive antenna element.
摘要翻译：响应于接收到具有与构件的带隙相关的两个波长的激发光束，第一和第二串联定位的电偏置半导体构件辐射微波能量。如果两个构件同时被电偏置，则投射的微波束可以变得更窄和定向。低效的倍频器产生两个波长光束，使得单个光束能够在简单，坚固的光导天线元件中激发两个部件。

2. 发明授权

US3942140A Method and means for coupling a multiplicity of surface acoustic wave transducers to a single electromagnetic wave transmission line 失效
标题翻译：用于将多个表面声波换能器耦合到单个电磁波传输线的方法和装置
公开(公告)号：US3942140A
公开(公告)日：1976-03-02
申请号：US522367
申请日：1974-11-08
申请人： Kenneth R. Laker , Alan J. Budreau , Paul H. Carr
发明人： Kenneth R. Laker , Alan J. Budreau , Paul H. Carr
IPC分类号： H03H9/02 , H03H9/145 , H03H9/76 , H03H9/26 , H01L41/08 , H03H9/30 , H03H9/32
CPC分类号： H03H9/72 , H03H9/0296
摘要： The input transducers of a multichannel surface acoustic wave device are electrically connected in a series or series-parallel circuit arrangement and are connected to a single channel electromagnetic wave transmission line through an inductor. The inductance value of the inductor is chosen such that minimum transducer insertion loss is achieved at the center frequency of the midband channel. The circuit arrangement is selected which achieves optimum coupling to the midband channel subject to the constraint that the insertion losses of all the remaining channels, measured at their respective center frequencies, lie at or near the above optimum value within an acceptable prespecified margin.
摘要翻译：多通道声表面波器件的输入传感器以串联或并联电路布置电连接，并通过电感器连接到单通道电磁波传输线。选择电感器的电感值，使得在中频带通道的中心频率处实现最小的换能器插入损耗。选择电路布置，其实现了对中频带信道的最佳耦合，受限于所有剩余信道的插入损耗在其各自的中心频率处测量在可接受的预定边界内处于或接近上述最佳值。

3. 发明授权

US4609843A Temperature compensated berlinite for surface acoustic wave devices 失效
标题翻译：用于声表面波器件的温度补偿贝氏体
公开(公告)号：US4609843A
公开(公告)日：1986-09-02
申请号：US705060
申请日：1985-02-26
申请人： Paul H. Carr , Jose H. Silva
发明人： Paul H. Carr , Jose H. Silva
IPC分类号： H01L41/18 , H03H9/02 , H01L41/08
CPC分类号： H01L41/18 , H03H9/02543 , H03H9/02834
摘要： The 19.1 propagation X-cut of berlinite (AlPO.sub.4) has been discovered to have cubic temperature compensation for surface acoustic waves (SAW). The temperature variations of frequency or time delay over a 35.degree. to 85.degree. C. temperature range are comparable to ST-quartz. However, berlinite has at least twice the piezoelectric coupling. This is essential for low insertion loss, broadband SAW devices such as filters and correlators. In addition, 19.1 propagation, X-cut berlinite has lower volume wave spurious than ST-cut quartz.
摘要翻译：已经发现柏木（AlPO4）的19.1传播X切割对表面声波（SAW）具有立方体温度补偿。在35℃至85℃的温度范围内的频率或时间延迟的温度变化与ST-石英相当。然而，贝氏体具有至少两倍的压电耦合。这对于低插入损耗，宽带SAW器件（如滤波器和相关器）至关重要。此外，19.1传播，X切割柏林具有比ST切割石英更低的体积波浪。

4. 发明授权

US06177909B1 Spatially light modulated reconfigurable photoconductive antenna 失效
标题翻译：空间光调制可重构光导天线
公开(公告)号：US06177909B1
公开(公告)日：2001-01-23
申请号：US09433762
申请日：1999-11-04
申请人： James R. Reid , John S. Derov , Paul H. Carr
发明人： James R. Reid , John S. Derov , Paul H. Carr
IPC分类号： H01Q138
CPC分类号： H01Q19/062 , H01Q1/38
摘要： A reconfigurable photoconducting antenna is created on a semiconductor substrate. At equilibrium, the semiconductor is semi-insulating, and therefore appears as a dielectric. Illuminating a region of the substrate results in the generation of free carriers in the substrate and allows the creation of a conductive region (semi-metallic) in the substrate. This conductive region functions as the radiating element of the antenna. Controlling the pattern of the illuminated region directly controls the pattern of the radiating antenna. By using a digital micromirror device (DMD™) to control the pattern of the light, a desired antenna design may be placed on the semiconductor substrate. The pattern can be dynamically adjusted simply by changing the position of the individual mirrors in the DMD™ array. The device operates through a standardized digital interface and can be switched between patterns in a period of approximately 20 microseconds. The pattern of the DMD™ can therefore be readily and easily controlled through the use of a digital control system.
摘要翻译：在半导体衬底上形成可重构的光电导天线。在平衡时，半导体是半绝缘的，因此表现为电介质。照射衬底的区域导致在衬底中产生自由载流子并且允许在衬底中产生导电区域（半金属）。该导电区域用作天线的辐射元件。控制照明区域的图案直接控制辐射天线的图案。通过使用数字微镜器件（DMD TM）来控制光的图案，可以在半导体衬底上放置期望的天线设计。可以通过改变DMD（TM）阵列中的各个反射镜的位置来简单地动态调整图案。该设备通过标准化的数字接口进行操作，并且可以在大约20微秒的时间段内在模式之间切换。因此，可以通过使用数字控制系统容易且容易地控制DMD TM的模式。

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