Scanning waveguide antenna array with MEMS enabled reconfigurable frequency selective surfaces in aperture

Semenikhina, Diana V.; Yukhanov, Y. V.

doi:10.1109/antem.2016.7550105

Cited by 3 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Magnetically tunable FSS is implemented by using a ferrite substrate for the permeability of the ferrite substrate can change with the external bias magnetic field (Chan et al, 2015;Gao et al, 2016;Liu et al, 1997;Parker & Savia, 2001). MEMS tunable FSSs are realized by using various MEMS actuators (Coutts et al, 2008;Lu et al, 2017;Safari et al, 2015;Schoenlinner et al, 2004;Semenikhin et al, 2016), which maybe can be driven by electrostatic, magnetic, thermal, piezoelectric, and electromagnetic methods. Although the magnetically and mechanically, even MEMS tunable FSSs do not need bias circuits, they usually suffer from several disadvantages such as complicated fabrication processes, slow tuning response, and small tuning range.…”

Section: Introductionmentioning

confidence: 99%

Varactor‐Tunable Frequency Selective Surface With an Appropriate Embedded Bias Network

et al. 2018

View full text Add to dashboard Cite

In this work, a varactor‐tunable frequency selective surface (FSS) is proposed; it is based on a common FSS composed of annular ring slot cells, in which four varactors are loaded on each annular ring slot to dynamically tune its resonant frequency in real time. In addition, an appropriate embedded bias network is added to introduce a same direct current bias voltage for each varactor. Numerical simulations demonstrate that the resonant‐frequency of the proposed FSS can be tuned over a 77.2% wide frequency range from 2.73 to 6.16 GHz by altering the capacitance of the varactors from 1.0 to 0.1 pF; moreover, the embedded bias network has little effect on the band‐pass response, and the minimum of the reflection coefficients is less than −24 dB at all times. Finally, one effective experimental validation is carried out. The proposed tunable FSS possesses the merits of wide tuning range and high transmittance; thus, it has great potential applications in the design of tunable radomes or adaptive screening of unwanted wireless transmissions.

show abstract

Section: Introductionmentioning

confidence: 99%

Varactor‐Tunable Frequency Selective Surface With an Appropriate Embedded Bias Network

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Reconfigurable antennas, filters, reflectors, antenna arrays, frequency selective surfaces, and other radio-frequency (RF) devices has been developed [36], because they have unique advantages over standard devices, such as band-switching and frequency tuning [37][38][39][40][41][42][43][44], beam-steering [45][46][47], polarization adjustment [52][53][54][55], and many other capabilities which are needed in future wireless communication systems.…”

Section: Reconfigurable Electromagnetic Devicesmentioning

confidence: 99%

“…PIN diodes are used as switches to control the effective electrical length of antennas [40][41][42]. Microelectromechanical system (MEM) switches also enable the development of reconfigurable antennas [43][44][45], frequency selective surfaces [46][47] and antenna arrays [48][49]. In [50][51], an optical controlled switch was used for a reconfigurable antenna design, the switch is preferred over electronically controlled switches because it provides perfect isolation between the controlling optical signal and controlled microwave signal even at high switching speeds…”

Section: Reconfigurable Electromagnetic Devicesmentioning

confidence: 99%

Origami Reconfigurable Electromagnetic Systems

Yao¹

View full text Add to dashboard Cite

With the ever-increasing demand for wireless communications, there is a great need for efficient designs of electromagnetic systems. Reconfigurable electromagnetic systems are very useful because such designs can provide multi-functionality and support different services. The geometrical topology of an electromagnetic element is very important as it determines the element's RF performance characteristics. Origami geometries have significant advantages for launch-and-carry electromagnetic devices where devices need to fold in order to miniaturize their size during launch and unfold in order to operate after the platform has reached orbit. This dissertation demonstrates a practical process for designing reconfigurable electromagnetic devices using origami structures. Four different origami structures are studied and the integrated Mathematical-Computational-Electromagnetic models of origami antennas, origami reflectors and origami antenna arrays are developed and analyzed. These devices provide many unique capabilities compared with the traditional designs, such as band-switching, frequency tuning, polarization adjustment and mode reconfigurability. Prototypes are also manufactured to validate the performances of the designs. These designs change their geometry naturally, and they can be compactly vii packaged into small volume, which make them very suitable for spaceborne and satellite communication. Origami antennas and origami electromagnetics are expected to impact a variety of applications related to communications, surveillance and sensing. viii

show abstract