【摘要】：隨著全球定位系統(tǒng)（GPS）的高速發(fā)展，對移動(dòng)便攜導(dǎo)航設(shè)備中的GPS接收天線提出更高的要求，微帶天線在小型化、圓極化和寬頻帶特性方面具有良好的性能。 在某軍事項(xiàng)目升級GPS抗干擾導(dǎo)航系統(tǒng)中，綜合考慮原有GPS接收機(jī)的空間尺寸，設(shè)計(jì)了一款用于GPS L1頻點(diǎn)1.57542GHz的微帶天線。該天線采用在輻射貼片邊上開單個(gè)槽的方法，并通過選擇適當(dāng)?shù)酿侂婞c(diǎn)位置，實(shí)現(xiàn)了微帶天線的右旋圓極化和小型化。使用Ansoft HFSS對微帶天線進(jìn)行仿真和優(yōu)化，得到了微帶天線的輻射貼片尺寸為38.5mm，，60o時(shí)增益大于1.4dB，軸比為2.25dB，仿真結(jié)果表明微帶天線具有良好的半球覆蓋性和軸比，達(dá)到了GPS抗干擾系統(tǒng)的要求。將微帶天線組成四單元的微帶天線圓形陣列，通過對微帶天線陣列仿真確定微帶天線單元的布局，達(dá)到抗干擾導(dǎo)航系統(tǒng)的對微帶天線陣列的回波損耗，隔離度和帶寬的指標(biāo)要求。 使用Agilent E8363B矢量網(wǎng)絡(luò)分析儀和天線測試轉(zhuǎn)臺(tái)SWZJ-5對微帶天線進(jìn)行了調(diào)試，測試結(jié)果表明設(shè)計(jì)的有效性，能夠滿足抗干擾GPS導(dǎo)航系統(tǒng)的要求。
[Abstract]:With the rapid development of global positioning system (GPS), higher requirements for GPS receiver antenna in mobile portable navigation equipment have been put forward. Microstrip antenna has a good performance in miniaturization, circular polarization and broadband characteristics. In a military project upgrading GPS anti-jamming navigation system, a microstrip antenna for GPS L1 frequency point 1.57542GHz is designed, considering the space size of the original GPS receiver. The right-hand circular polarization and miniaturization of the microstrip antenna are achieved by selecting the proper position of the feed point and using the method of opening a single slot on the edge of the radiation patch. The microstrip antenna is simulated and optimized by Ansoft HFSS. The radiation patch size of the microstrip antenna is 38.5 mm, the gain is more than 1.4 dB and the axial ratio is 2.25 dB at 60o. The simulation results show that the microstrip antenna has good hemispherical coverage and axial ratio. Meet the requirements of GPS anti-jamming system. The microstrip antenna is formed into a four-unit circular array of microstrip antennas. By simulating the microstrip antenna array, the layout of the microstrip antenna element is determined, and the echo loss of the microstrip antenna array of the anti-jamming navigation system is achieved. Isolation and bandwidth requirements. The microstrip antenna is debugged by using Agilent E8363B vector network analyzer and antenna test turntable SWZJ-5. The test results show that the design is effective and can meet the requirements of anti-jamming GPS navigation system.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TN822;P228.4

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