单词 | Antenna |
例句 | 1. There is a 15-foot arm supporting the antenna. 2. He said he would head the antenna with a ball. 3. In our village, there is an antenna on every roof for receiving TV signals. 4. The satellite has difficulty swiveling its antenna toward Earth. 5. The spatial resolution of the antenna was 74. 6. It appears that the in-cockpit antenna is the problem. 7. The antenna is kept constantly tracking Earth by motors controlled from the central computer. 8. The district agreed to let Sprint place an antenna on Northmont Elementary School without notifying neighbors and students' parents. 9. But it was still operating, feeding the antenna the impulses that kept it aimed at the far-off pinpoint of Earth. 10. The prototype antenna popped from its carrier like a jack-in-the-box, and its three 92-foot accordion struts inflated as planned. 11. Hooking up a powered antenna by Terk, which amplifies incoming signals and allows greater directional fine-tuning, produced no appreciable improvement. 11. is a online sentence dictionary, on which you can find excellent sentences for a large number of words. 12. He pushed himself gently away from the antenna mount, just in case the big dish went wild when power was restored. 13. The antenna is the centerpiece of a variety of science and technology experiments on the mission. 14. Another appears to be a satellite transmitting antenna built atop a two-story platform. 15. The antenna was stored in a large box atop Spartan. 16. Antenna Hungaria, which transmits radio and television programs, is also on the block again. 17. I put up the antenna the zombie watched me from behind his clutter of uncovered food. 18. Our TV receives well since we had a new antenna put on. 19. None the less, many physicists agree that the new antenna is a simple(), yet particularly clever idea. 20. A man beside a pickup truck was standing alongside the road, twirling a radio antenna. 21. The station will keep operating using two tracking radar dishes and a 40-foot-diameter telemetry antenna dish. 22. Two hours later, when the flaps of the box folded down, the antenna unfurled. 23. Inside Discovery, David Bowman carefully centered the cross-wires that aligned the antenna on the gibbous Earth. 24. In their most visible work, astronauts will let loose a retrievable satellite carrying a coffin-sized inflatable antenna. 25. I'd like to find the punk who broke off my car antenna. 26. Earth had begun to drift from the cross-wires; the radio antenna was no longer pointing toward its target. 27. The outermost ring, shortest of the four, is the high-band antenna array. 28. Then passersby saw thousands of feet of wire being strung, and soon a huge, strange-looking antenna system began taking shape. 29. Spartan was used as a platform for the inflation of a huge antenna, which later was jettisoned from the satellite. 30. Without mathematical modelling, the problem would not have been discovered until the complete antenna subsystem had been built and tested. 1. Our TV receives well since we had a new antenna put on. 31. As a result, sports fans are no longer limited by the reach of their radio antenna. 32. It will raise an antenna and run a cable from the truck to a camera to record pictures of the burning building. 33. It keeps our main antenna aimed at Earth to within a few thousandths of a degree. 34. However, to make doubly certain, he sprayed on a second layer; then he set off toward the antenna. 35. PacBell Mobile added four antenna sites this month and has expanded its total coverage by 125 square miles since January. 36. The null in the directional response of such an antenna is quite independent of the Q of the coil. 37. Not even the hint of an antenna is visible from the lonely two-lane public road that passes about a mile away. 38. By the half-way stage it was apparent to the dimmest Danuese that it was a communications antenna. 39. Detachable antenna unit mounted away from the control unit. 40. The original installation receiving antenna, strengthens the signal receptivity. 41. At the same time, the damped sine time domain waves with different attenuation speed are fed into the double ridged horn antenna,(http:///antenna.html) and different radiated fields are analyzed. 42. The T - shaped antenna is a monopole fed with coplanar waveguide ( CPW ), and has a broad bandwidth. 43. The invention discloses an electromagnetic measurement comprehensive darkroom for electromagnetic compatibility test and antenna measurement. 44. In the view of structure analysis, this paper discusses the application of ANN method to the analysis of antenna perforated panel. 45. The antenna switch unit is selectively coupled to the first antenna or the second antenna. 46. The antenna dustup has already hurt Apple's shares, knocking billions off its market capitalization. The company's shares are down more than 10 percent since the iPhone 4 launch. 47. A new model of dealing with solar radiating disturbance is put forward and a systematic explanation to the antenna noise temperature analysis in case of solar radiating disturbance is made. 48. In addition the duplex system , antenna and feeder line are discussed. 49. It is essential for GPS receiver verification to detect the phase center deviation of antenna. 50. A new developing direction of seeker conformal phased array antenna is given. 51. A coaxial base - loaded antenna on finite ground and conductive step is analysed by hybrid method of MM/GTD. 52. While mid-wave antenna is mostly iron tower antenna,[] we do not use directional antenna except that we need special service in special area. 53. The paper discusses the importance of background-noise's level of decimeter wave-band on antenna and its basical technical condition and request. 54. The bistatic 2-D imaging measurement is presented, which is applied in a Compact range with a horn antenna as the receive antenna. 55. Some interesting conclusions for antenna structure design are obtained by studying the optimum antenna structures. 56. A dish antenna, also known simply as a dish, is common in microwave systems. 57. To obtain the MIMO capacity gains in indoor NLOS environment, antenna interval and antenna structure should be considered jointly when designing the antenna array . 58. In the development of the next generation phase array radar, intelligent antenna has become the important development direction. 59. In this paper, DOA is estimated with non-uniform linear antenna array (NULA) instead of ULA, so as to achieve a much larger aperture with the same amount of antenna elements. 60. This article introduced a simple method to solve this problem which is suit to different forms satellite receiver antenna. 61. A self-optimizing control system for antenna automatic tracking is described in this paper. In this system, a microcomputer is used. 62. A sensory or tactile organ, such as an antenna a tentacle, or a barbel. 63. Earth station: A parabolic antenna and associated electronics for receiving and transmitting satellite signals. 64. It is demonstrated that, to the half-wave dipole antenna, meander-line dipole antenna has the better feature of miniaturization while maintaining the required radiation efficiency. 65. A method of designing single-feed circularly polarized microstrip antenna for GPS applications is presented in the article. 66. "Near to far" and "far to near" field transformations are carried out for the data measured on a sphere surrounding the pyramidal horn antenna. The transformed results agree well with the... 67. Finally the lobe of the antenna is verified by emulation and experiments. 68. Finally we use FR4 to fabricate the antenna and use the vector network analyzer to measure the reflect coefficient, antenna impedance and the antennas pattern in the chamber. 69. A beam shaping algorithm for circular arrays antenna pattern based on adaptive antenna array theory is presented. 70. Fixing the Antenna: Use of a double - faced adhesive tape on the grounding plate is recommended. 71. Azimuth resolution of meter wave radar can be improved by using super resolution spectrum estimation methods without extending the antenna aperture. 72. Each antenna element either resonates independently, or increases the total bandwidth of operation of the multi-band antenna system 100, in the low frequency band. 73. One of Dr Dickey's rubber - coated antennas, though, can be tuned by stretching the antenna itself. 74. From the resultant figures, we know the back lobe gain of UC-PBG patch antenna is smaller than that of regular one. 75. The control algorithm of attitude follow-up stabilization and tracking antenna platform adopts position feed-forward control, speed control and position feedback control. 76. This thesis mainly analyzes the coaxial probe - fed microstrip antenna and studies the broadband microstrip antenna. 77. Two novel spherical helical antennas are designed by projecting the planar equiangular spiral antenna onto the surfaces of hemisphere and partial sphere. 78. Used in the CCTV system , antenna television system branch line , subscriber line and other electronic devices. 79. A new half spherical helical antenna at the taper mode is presented first time. It has smaller volume and provides good shaped pattern which is suitable for LEO satellite communication. 80. The distance between antenna elements and element's excitation currents are used as variables to optimize the side lobe of equal space linear array firstly. 81. A series of experiment is made to test the utility of these sensors. The way to use these sensors in the antenna stabilization system and to make up of the error is proposed here. 82. Fundamental form and some kinds of deformations about TEM horn antenna which often be used in the time domain have been summarized, some kinds of its difference feed means have been introduced . 83. Being a new field of research, retrodirective antenna not only saves the cost of RF front-end system, but also simplifies the data processing. 84. The article introduces a kind of passive radar with large antenna structure and high mobility. 85. Blind landing is gaining popularity in recent years. And the millimeter-wave antenna is an important part of the whole navigation system. 86. A novel design procedure of a circular antenna array and its calibration technique for smart antenna system is proposed. 87. The inter-satellite linkage antenna of low-Earth-orbiting satellites pointing to the TDRS stably and quickly is very important to establish the communication linkage with the TDRS. 88. A basic scheme for detecting subsurface targets with EM pulse of nanoseconds and an especially developed travelling-wave antenna of high quality are described. 89. If equipped, remove the radio antenna mast, and components from the fender. 90. The designed shield resonance loop antenna (SRLA) holds better standing wave ratio (SWR), stronger ability to suppress interferences. 91. Developing, testing and debugging cellular phone RF circuits, and multi - band antenna. 92. Typical application: Antenna Air Pump , Popcom Maker , Ball Sender. 93. The system's antenna emits a focused beam of millimeter wave energy. 94. According to the characteristic of antenna structure, the probability description of multi loading cases is presented. 95. In this paper, the principle and influencing factors of small loop antenna loaded with reactive elements are investigated. 96. The invention relates to a multiband antenna device and a communication terminal device. 97. And Wilson and Penzias discovered the cosmic microwave background radiation, physical evidence for the Big Bang, while fiddling with an antenna designed to catch radio waves bouncing off satellites. 98. The circular fixation modes and their features of drive parts in antenna pedestal system of radar are analyzed in terms of some typical design examples of the system. 99. Antenna Tower Update Gina and Lookout "Mountain" west of Denver, Denver, Colorado ..." Colorado " and the United States Senate to take over the local television station lucrative "land-use" towers. 100. Several variations of this antenna have appeared in abbreviated form in US magazines, none has been complete. 101. A compact rectangular monopole antenna a tapered coplanar waveguide ( CPW ) with a band - notch function is proposed. 102. The two-arm hemispherical helical antenna has very wide impedance and pattern bandwidth, and its gain in the whole band is larger and wave mildly,(http:///antenna.html) which show that... 103. A helical antenna is a specialized antenna that emits and responds to electromagnetic fields with rotating (circular)polarization. 104. Circuitry design and analysis must involve antenna gain in satellite communications. 105. The popular solutions of automatic tracking system of mobile satellite antenna are compared and analyzed, and then the application gyroscope and satellite signal receiver are discussed. 106. The novel definition of eigen - driven mode is given in antenna array analysis by the Moment Method. 107. One factor is that unlike the old line feed antenna, which was hanging by itself, exposed to the tropical elements, the multi-beam receiver is located inside the distinctive-looking Gregorian dome. 108. This paper has introduced the principle of the process antenna effect, and repair methods. 109. His shoulder, sunk in an old military jacket, rested against the wall and a radio antenna stuck out of his pocket. 110. The study object of this paper is a certain aircraft based radar antenna pedestal. 111. Main work include : 1 A method of adaptive DBF in received antenna array. 112. Phased array radar, is to use phase-shifting electronically controlled antenna array as the main components of a radar. 113. The key technology for the whip-loop antenna, receiver, signal-processing platform and time-division is described in detail, respectively. 114. This paper mainly introduced the laser measure system on the SAR antenna stabilization platform test system. 115. The airborne SAR presented here uses a four horn antenna to detect and track ground moving target. 116. Antenna system maintenance and measurement: precision gang switch and support device. 117. Qualitatively analyze the existing problem of the antenna height scanning for the EUT with radiating characteristics(single lobe and multi-lobes)in the measurement method. 118. A speaker device installed in an earpiece, for improving an antenna property in a wireless portable terminal is provided. 119. The radio and television transmitting antenna is the important part of FM radio, TV antennas system. 120. Thus the research on dielectric antenna in time - domain is very significant. 121. Simultaneously, a better optimization result of the linear antenna array patterns can be obtained as well by using this algorithm. 122. It is demonstrated that this novel electrically small antenna has extremely high radiation efficiency. 123. These signals provide an important reference of the gain of antenna, the time reference, the phase reference and the frequency of carrier wave for generating stimulant echo signal. 124. The SBR method is so simple in concept that there is virtually no restrication on the shape or place of the scanning antenna. 125. An active antenna consisting of electrically small antennas and a negative impedance changing circuit is analyzed in this paper. 126. Propose a method for mutual coupling compensation which is not limit to microstrip arrays and can be used in any small antenna arrays of arbitrary type and arrange. 127. A new backfire antenna fed by a bifilar backfire belix is described in this Paper. 128. Tensility structures, cable antenna and inflatable antenna are all flexible structures. 129. Decreasing the tuning time of the antenna is very important in intelligentized and automated short wave adaptive communication systems. 130. A study is made in the paper of the self-adjustment of the antenna of a satcomship station A. Also studied here is the calculation of TDM carried level. 131. A patch antenna is a wafer-like directional antenna suitable for covering single-floor small offices, small stores and other indoor locations where access points cannot be placed centrally. 132. In WiTricity's demo, the company embedded metal coils in an iPhone and in a secondary device that resembled a large radio antenna. 133. It is a new attempt and exploration to apply the dual-loop antenna to the 3G base station. 134. Only a properly matched antenna system will allow maximum power transfer from the 50 transmission line to the radiating element. 135. In order to achieve the communication between the ship board antenna and the synchronous communication satellite, a method by the digital guiding closed loop and level open loop tracker is presented. 136. To obtain the balanced feed for the dipole antenna driven by a coaxial transmission line, a coplanar waveguide fed structure is used. 137. Based above result , we get the symbol error rate of the UWB system with multi - antenna . 138. According to induction and the work of authors, the potential applications in perfect lens antenna, phase-shifting line, balancer and coupler were given. 139. The simulation results verify the proposed algorithm and show that each antenna power limit decreases the bit rates to some extent. 140. The bandwidth characteristics of subarray excited devices have important influence on the beam bandwidth and VSWR bandwidth of a planar array antenna. 141. The center of three-in-one combination means the optimum center of wind moment , center of gravity and center of rotation of antenna system are Com bined. 142. The impedance characteristics of the wide-band E-shaped microstrip antenna is analyzed by using the FDTD method. The antenna bandwidth of impedance can exceed 30%. 143. A professional automation manufacturer, Inc. Car radio, ECU, antenna etc. 144. FDTD was used to make simulated analysis of the time domain antenna array. Patterns in H plane were measured through outdoor oscillograph. 145. Unplug the antenna coaxial cable connector from the radio chassis. 146. Some (Apple included) have pointed out that all phones suffer some signal attenuation when held near the antenna. 147. Certain configurations, such as TV rabbit ears, also allow consumers to rotate or pitch antenna elements to reduce interference. 148. The obvious echoes of the side-lobe transmitting waves are caused by the transmitting antenna working on the condition of a stimulation pulse with abnormal pulse width. 149. The simulation indicated that the polarization axial ratio and antenna gain pattern of this antenna are good for "BD-1" signal and GPS signal. 150. Alternatively, a transfer paper with the antenna pattern printed thereon may be attached to the inner surface of the terminal device. 151. This dissertation develops two millimeter waves microstrip antenna arrays which can be applied to the millimeter wave radar, the communication and the identification for friend-or-foe. 152. Genetic Algorithm(GA) has been shown to be an effective strategy in the off-line optimization, which is fit for designing shaped-beam antenna array. 153. The effects of element failure and tolerance on antenna sidelobe level and gain in solid-state active phased array is mainly discussed in this paper. 154. Fu - hu has said that current antenna video content is essential to take the buyout approach. 155. The segment of a satellite transmission satellite to an earth station or receiving antenna ( dish ). 156. A sphere, in contrast, concentrates its beam to a line – which is why a "line feed" antenna was originally used at Arecibo. 157. Organizations with a need for lightweight and quick-deploy antenna terminals, such as the United States Army, would greatly benefit from these features. 158. In the methods, single feed, more feed and several patches consisting circular polarization are used to feed the antenna and improve the impendent or AR bands. 159. An Archimedean planar spiral antenna mounted on the grounded double layer is investigated. 160. With the enlargement of the surfaces, antenna gain also increases, at first considerably and later on less and less. 161. The wireless communication system includes at least one gateway antenna arranged at an entrance point of the enclosed environment. 162. Responsible for anechoic chamber designs for EMC and antenna test and measurement requirements. 163. The frequency response may also be controlled by a low voltage micro sized varicap, or a varactor diode, and instantiated as a tuned, resonant matching filter network residing with the antenna module. 164. Adaptive sliding mode control (ASMC) method was applied in satellite antenna tracking and pointing servo system. 165. The kernel problem of antenna stabilization and tracking technology is the initial alignment and automatic tracking technology of antenna toward satellite. 166. It is a property for practical application as a frequency scanning antenna since it ensures a stable radiation pattern with little distortions while beam is being scanned. 167. The condition that meets the linear superposition is discussed. The Amendment technique of the lens antenna structures is improved utilizing the simulated radiation pattern. 168. An actual radar antenna pattern plotted by using the method shows approximately no difference from the practically measured results based on solar noise. 169. Waveguide shape is one of the most difficult problems in slotted waveguide array antenna processing. 170. It is an effective way to enhance this counter - jamming ability using array antenna. 171. The Space - borne Antenna is a new type of foldable structure which appears in recent years. 172. The antenna does not synchronize scanning. The heading line is not stable. The echo position is changed accordingly. 173. The system employs multiple detectors, each comprising an antenna coup LED with a device ( a bolometer) for measuring the energy of incident electromagnetic radiation. 174. Distributed antenna systems ( DAS ) is considered to be a promising candidate for future mobile communications. 175. As you can see from the radar data, there appears to be light precipitation within a 30-mile radius of the radar antenna. 176. Finally, the servo test bench and airborne antenna pedestal for parametric modeling and simulation to illustrate the usefulness of this analysis platform. 177. In prior art, the position and attitude control for antenna can only realized in small-scale, and lies in the means of hydraulic cylinder, gear box and rotary joint . 178. The main lobe of a fixed billboard antenna may, within limits, be steered by appropriate phasing of the respective signals to individual elements of the array. 179. In actual radar antenna design several thousand elements could be used to obtain a high-gain antenna with a beam width of less than two degrees. 180. OCX will deliver new GPS mission planning, constellation management, ground antenna, monitoring station, and satellite command and control capabilities. 181. What is the impedance of half wavelength single pole antenna? 182. With same circular radiating antenna, same center frequency pulse, the analytical and numerical results of axial energy of several typical waveform pulse are offered by electromagnetic theory. 183. The antenna introduced in this paper is different from the ordinary reconnaissance radar, which is a passive antenna receptive system receiving target radar signals. 184. Through the correction of phase and amplitude weighting, the conformal antenna can generate required sum beam far-field pattern and meet the design specification. 185. Calculate the excited loop size (1/5 of the length of the main loop) and this floating loop antenna is ready to safe your life. 186. The geometric nonlinear problem of whip antenna structure underthe action of nonconservative loads is analyzed by means of the loading incremental method which has the balanceiteration format. 187. The effect of antenna parameters on the beamwidth and side lobe level is analyzed. 188. Planar antenna has small size, light weight and low profile. |
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