A Measured  Rasorber with Two Absorptive Bands

Lu, Hongshu; Cui, Kai; Wu, Wei; Yuan, Naichang; Meng, T. Z.

doi:10.13164/re.2017.0979

Cited by 17 publications

(10 citation statements)

References 17 publications

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“…Furthermore, the redundant signals could decrease the signal noise ratio (SNR) of the communication systems. In order to reduce the reflection in the stopband, rasorber (a combination of the terms ''radome'' and ''absorber'') has been introduced and attracted a lot of interest recently [10]- [20]. The in-band signal is transmitted through the rasorber with low insertion loss.…”

Section: Introductionmentioning

confidence: 99%

Design of a Frequency-Selective Rasorber Based on Notch Structure

Sun

Deng

et al. 2019

IEEE Access

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This paper reports a dual-polarized frequency-selective rasorber that has a transmission window with low insertion loss and two absorption bands at both sides of the passband. Equivalent circuit and simple design guidelines for rasorber design are further developed. First, the notch structure with high Q is used to make the absorber realize the notch characteristic. Then, a frequency selective surface is utilized to replace the ground of the absorber. Note that the center frequency of the passband is consistent with the notch frequency. Therefore, the incident power is allowed to penetrate the proposed rasorber with a low insertion loss and transmissive behavior of the proposed rasorber is realized by this way. In addition, it is found that the main transmission band and lower absorption bands almost maintain stable performances in the angular range of 0 • to 35 • , while the upper absorption bands get slightly worse as angular range increases for both the TE and TM incidences. A rasorber prototype has been fabricated to experimentally validate the principle and design approach. The measurements agree reasonably with the simulated ones. Finally, a broadband and high-selectivity rasorber is achieved simultaneously. INDEX TERMS Absorption, dual-polarized, insertion loss, rasorber, transmission. MEIJUN QU received the B.S. degree from the College of Physics and Electronics, Shanxi University, Taiyuan, China, in 2015. She is currently pursuing the Ph.D. degree with the School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing, China. Her research interests include microwave passive components, antenna, metamaterials, and electromagnetic compatibility. SIYANG SUN is currently a Deputy Research Fellow with the China Academy of Information and Communication Technology, China Telecommunication Technology Labs. As an Antenna Research and Development Engineer, he has participated in many national scientific research projects. He was responsible for the development and testing of antenna systems, completed the design, commissioning, and testing of various antennas (arrays), and successfully applied them in many projects. As a Project Director Designer, he was responsible for the coordination, communication, document writing, debugging, and testing of the project. He is currently involved in MIMO OTA and 5G terminal testing, standard setting, and related technology research. He has published over 10 academic papers and has applied for a national defense patent. LI DENG was born in Sichuan, China, in 1982. He received the B.Eng. and M.Eng. degrees in communication engineering from Beijing Jiaotong University, in 2004 and 2007, respectively, and the Ph.D. degree in communication engineering from the Beijing University of Posts and Telecommunications (BUPT), Beijing, China, in 2010. In 2012, he joined BUPT. He is currently an Associate Professor with the School of Information and Communication Engineering, BUPT. His research interests include electromagnetic theory, metamat...

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Section: Introductionmentioning

confidence: 99%

Design of a Frequency-Selective Rasorber Based on Notch Structure

Sun

Deng

et al. 2019

IEEE Access

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“…For this reason, previous studies focused on developing design methods for implementing an absorption band through resistive layers that cause loss (dissipation). Typical design methods for resistive layers have been attempted, including for lossy material (high electrical or magnetic loss), for which it is easy to make thin designs, resistive sheet‐based FSS, which has relatively stable properties in terms of polarized waves and incidence angles, and various methods that use lumped resistor‐loaded resistive FSS . Currently, studies are being conducted on absorptive‐FSS, which includes lumped element‐based strip‐type resonator structures, which enables the resistive layer to operate as an open‐circuit at the in‐band to minimize transmission loss …”

Section: Introductionmentioning

confidence: 99%

“…When lossy material is used, it is not only difficult to implement low‐loss properties at the in‐band, but a thicker material is also required compared to the frequency band in terms of the design of the absorption properties; further, it is difficult to control the undesirable harmonic resonances caused by the changes in the incidence angle . In addition, the use of resistive sheet‐based FSS is limited as this kind of FSS is challenging to manufacture; for example, difficulty in implementation of the FSS with respect to optimal surface resistance properties is often encountered . To improve the limitations in the design method of these previous studies, other studies have proposed the use of FSS‐based resistive layers, which are composed of strip‐type L and C resonators or lumped elements such as resistors, inductors, and capacitors .…”

Section: Introductionmentioning

confidence: 99%

Practical absorptive frequency selective surface based on printed electronics technology for radome applications

Lee

Kim

2019

Micro & Optical Tech Letters

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This study uses screen-printing technology to create resistive components by employing carbon-based electric ink (55 Ω/□) printing, and an absorptive frequency selective surface (FSS) was designed with absorptive properties in the C-band and transmissive properties in the X-band. This was done to ensure structural stability and to overcome the limitations of lumped-element-based absorptive-FSS, which make it difficult to ensure the stability of electrical properties owing to thermal and mechanical factors in the hybrid composite laminated structure. The proposed structure reduces parasitic components by substituting printed resistive components instead of the lumped element having the weakness of a difficult to predict electrical performance according to the frequency band. Fabrication and measurement tests were performed to verify the performance of the proposed structure by comparing the frequency response properties in normal and oblique incidence conditions, the measured results show good agreement with the simulation results. K E Y W O R D Sabsorptive frequency selective surface, hybrid composite, oblique incidence, radome, screen-printing

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“…The main aim of such absorbers is to reduce the unwanted reflections significantly in certain frequency range. Since the classical Salisbury screen [1] and Jaumann absorber [2] are introduced, there have been numerous absorbing structures put forward [3] [4]. However, these absorbers have shortcomings of narrow bands and heavy thickness.…”

Section: Introductionmentioning

confidence: 99%

A Novel Tunable Broadband Absorber based on Graphene

Liu

Yuan

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract--A tunable wideband absorber is presented in this paper. It is based on periodic resistive patterned graphene operating in microwave regime. The proposed absorber not only has wide absorption band but also can be tuned by changing the conductivity of graphene. At chemical potential of 0.3 eV, 90% absorption can be achieved from 10.2GHz to 43.5GHz with 124% fractional bandwidth. Furthermore, the absorber shows relatively stable performance with respect to the incident angle of plane waves. IntroductionElectromagnetic absorbers have been of great interest over the last decades. The main aim of such absorbers is to reduce the unwanted reflections significantly in certain frequency range. Since the classical Salisbury screen[1] and Jaumann absorber[2] are introduced, there have been numerous absorbing structures put forward [3][4]. However, these absorbers have shortcomings of narrow bands and heavy thickness. In order to improve the performance of absorbers, periodic resistive patterns called frequency selective surfaces(FSSs)are applied to absorbers [5]. Without the limitation of one quarterwavelength thickness, it can achieve a wideband in terms of 90% absorption. However, the aforementioned absorbers remain fixed structures, which makes bandwidth invariant. The solution to achieve a tunable absorber is to combine pin diodes or new materials such as graphene into the FSS structure.Graphene has appealed a great attention in absorbing owing to its excellent and unique electrical, optical and mechanical properties, since it is first acquired by using micromechanical cleavage by Geim and Novoselov in 2004[6]. In recent years, a large number of graphene-based absorbers have been discussed in [7]-[12]. A transparent graphene absorber with 28% fractional bandwidth at 140GHz has been experimentally demonstrated in [7]. In[8], graphene-based high impedance surface is proposed as an absorbing structure at microwave frequencies. Graphene periodic resistive patterns called frequency selective surfaces are applied to absorber [9].In[10] and [11], by changing chemical potentials, the absorption energy of transparent graphene broadband absorber is controlled over a relatively large interval in the frequency band. A transparent absorber based on patterned graphene film is theoretically illustrated, practically fabricated and experimentally demonstrated [12].In this paper, a novel, thin and graphene-based absorber is designed by placing Jerusalem-shaped graphene patch between dielectric layers. Graphene's tunability and frequency-independent surface impedance in microwave band is utilized for broadband matching and high absorption. Consequently, the proposed absorber can obtain wideband characteristic and be tunable. Moreover, the absorption stays large when the incident angle is smaller than 60°. The design and performance of the absorber will be discussed in details in the following parts.

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A Measured Rasorber with Two Absorptive Bands

Abstract: Abstract. In this paper, a novel rasorber with both

Cited by 17 publications

References 17 publications

Design of a Frequency-Selective Rasorber Based on Notch Structure

Design of a Frequency-Selective Rasorber Based on Notch Structure

Practical absorptive frequency selective surface based on printed electronics technology for radome applications

A Novel Tunable Broadband Absorber based on Graphene

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