下一代高速無線通信系統(tǒng)中的寬帶射頻濾波器的研究
發(fā)布時間：2018-07-14 17:55
【摘要】：近年來,以第五代(5G)移動通信系統(tǒng)為代表的高速無線通信系統(tǒng)受到廣泛關(guān)注。作為無線通信系統(tǒng)的關(guān)鍵器件之一,濾波器性能的優(yōu)劣會對整個系統(tǒng)的性能產(chǎn)生顯著影響,因此它已成為毫米波領(lǐng)域的研究熱點�；刹▽�(dǎo)(SIW)因為具有低插損、高品質(zhì)因數(shù),以及易于與平面電路集成的優(yōu)點在濾波器設(shè)計中大量采用。因此,本文基于SIW技術(shù),在三個5G通信系統(tǒng)備選頻段以及太赫茲頻段對濾波器進(jìn)行了研究。主要工作如下:首先,在9-15GHz和25-30GHz兩個5G通信系統(tǒng)備選頻段,分別設(shè)計了小型寬帶平面濾波器。為了克服傳統(tǒng)SIW濾波器在較低頻段尺寸大、帶寬受限的缺點,本文設(shè)計的寬帶濾波器使用平行耦合帶狀線作為主體結(jié)構(gòu),并且利用SIW將帶狀線結(jié)構(gòu)封閉在中間層,顯著降低了輻射損耗。濾波器采用了自封裝的形式,具有低插損的特點。實驗結(jié)果表明,濾波器性能良好。其次,Q波段也是5G通信系統(tǒng)備選頻段之一。利用多層SIW技術(shù),本文設(shè)計了一個Q波段的平面帶通濾波器。帶通濾波器由高通和低通濾波器級聯(lián)形成,高通濾波器的設(shè)計利用了 SIW傳輸線的高通特性,而低通部分則由5個毫米波集總元件諧振單元級聯(lián)形成。濾波器的中心頻率為42.5GHz,相對帶寬為11.76%。測試結(jié)果表明所設(shè)計的濾波器具有低插損、高抑制以及帶寬易于調(diào)整的優(yōu)點。該項工作已被Wiley,Microwave and Optical Technology Letters 錄用,已經(jīng)出版。最后,本文基于電磁帶隙(EBG)結(jié)構(gòu)在G波段設(shè)計了一個帶通濾波器。利用周期性EBG結(jié)構(gòu)的阻帶特性,設(shè)計了一個截止頻率為190GHz的低通濾波器,然后將它與利用SIW高通特性設(shè)計的截止頻率為180GHz的高通濾波器進(jìn)行級聯(lián),得到了通帶范圍為180-190GHz的帶通濾波器。最后將所設(shè)計的濾波器與鰭線轉(zhuǎn)接進(jìn)行連接后,利用低成本的PCB工藝進(jìn)行加工,對設(shè)計進(jìn)行了驗證。該項工作已投IET Electronic Letters,正在審稿中。
[Abstract]:In recent years, the fifth generation (5 G) mobile communication system, represented by high-speed wireless communication system, has received wide attention. As one of the key devices in wireless communication systems, the performance of the filter will have a significant impact on the performance of the whole system, so it has become a research hotspot in the field of millimeter wave. Substrate integrated waveguide (SIW) is widely used in filter design because of its advantages of low insertion loss, high quality factor and easy integration with planar circuits. Therefore, based on SIW technology, the filter is studied in three alternative frequency bands of 5G communication system and terahertz band. The main work is as follows: firstly, small wideband planar filters are designed in the alternative frequency bands of 9-15GHz and 25-30GHz. In order to overcome the disadvantages of the traditional SIW filter with large size and limited bandwidth in the lower frequency band, the broadband filter designed in this paper uses parallel coupled banded lines as the main structure, and uses SIW to seal the banded line structure in the middle layer. The radiation loss is significantly reduced. The filter adopts the form of self-encapsulation and has the characteristic of low insertion loss. The experimental results show that the filter has good performance. Secondly, Q band is also one of the alternative frequency bands of 5 G communication system. Using multilayer SIW technique, a Q band planar bandpass filter is designed in this paper. The bandpass filter is formed by cascading high pass filter and low pass filter. The design of high pass filter utilizes the high pass characteristic of SIW transmission line, while the low pass part is formed by 5 millimeter wave lumped element resonant unit cascaded. The center frequency of the filter is 42.5 GHz and the relative bandwidth is 11.76 GHz. The test results show that the designed filter has the advantages of low insertion loss, high suppression and easy bandwidth adjustment. The job has been hired by Wileyn Microwave and Optical Technology Letters and published. Finally, a bandpass filter is designed in G band based on the electromagnetic band gap (EBG) structure. Based on the stopband characteristic of the periodic EBG structure, a low-pass filter with a cut-off frequency of 190GHz is designed and cascaded with a high-pass filter with a cut-off frequency of 180GHz designed by using the SIW high-pass characteristic. Bandpass filters with a passband range of 180-190 GHz have been obtained. Finally, the designed filter is connected to the fin line, and the design is verified by using the low cost PCB process. This work has been submitted to IET Electronic Letters and is under review.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN713
本文編號：2122494
[Abstract]:In recent years, the fifth generation (5 G) mobile communication system, represented by high-speed wireless communication system, has received wide attention. As one of the key devices in wireless communication systems, the performance of the filter will have a significant impact on the performance of the whole system, so it has become a research hotspot in the field of millimeter wave. Substrate integrated waveguide (SIW) is widely used in filter design because of its advantages of low insertion loss, high quality factor and easy integration with planar circuits. Therefore, based on SIW technology, the filter is studied in three alternative frequency bands of 5G communication system and terahertz band. The main work is as follows: firstly, small wideband planar filters are designed in the alternative frequency bands of 9-15GHz and 25-30GHz. In order to overcome the disadvantages of the traditional SIW filter with large size and limited bandwidth in the lower frequency band, the broadband filter designed in this paper uses parallel coupled banded lines as the main structure, and uses SIW to seal the banded line structure in the middle layer. The radiation loss is significantly reduced. The filter adopts the form of self-encapsulation and has the characteristic of low insertion loss. The experimental results show that the filter has good performance. Secondly, Q band is also one of the alternative frequency bands of 5 G communication system. Using multilayer SIW technique, a Q band planar bandpass filter is designed in this paper. The bandpass filter is formed by cascading high pass filter and low pass filter. The design of high pass filter utilizes the high pass characteristic of SIW transmission line, while the low pass part is formed by 5 millimeter wave lumped element resonant unit cascaded. The center frequency of the filter is 42.5 GHz and the relative bandwidth is 11.76 GHz. The test results show that the designed filter has the advantages of low insertion loss, high suppression and easy bandwidth adjustment. The job has been hired by Wileyn Microwave and Optical Technology Letters and published. Finally, a bandpass filter is designed in G band based on the electromagnetic band gap (EBG) structure. Based on the stopband characteristic of the periodic EBG structure, a low-pass filter with a cut-off frequency of 190GHz is designed and cascaded with a high-pass filter with a cut-off frequency of 180GHz designed by using the SIW high-pass characteristic. Bandpass filters with a passband range of 180-190 GHz have been obtained. Finally, the designed filter is connected to the fin line, and the design is verified by using the low cost PCB process. This work has been submitted to IET Electronic Letters and is under review.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN713
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，本文編號：2122494
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