2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting

Conference Information
Name: 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting
Location: Atlanta, United States
Date: 2019-7-7 - 2019-7-12

Latest articles from this conference

Trevor Brown, Chaitanya Narendra, Yousef Vahabzadeh, Christophe Caloz, Puyan Mojabi
This paper summarizes and synthetically evaluates a method proposed for metasurface design. The method takes as input a set of desired far-field (FF) performance specifications and produces an effective susceptibility distribution that, when illuminated with a known incident field, produces a FF radiation pattern exhibiting the desired specifications. To this end, electromagnetic inversion (inverse source) is used to solve for the desired tangential fields on the output side of the metasurface. A finite-difference frequency-domain solver, recently developed for simulation of metasurfaces, is used to synthetically evaluate the proposed method using a two-dimensional (2D) example. It should be noted that microscopic metasurface design (i.e., the design of the physical metasurface implementation) is beyond the scope of this paper.
Dhruva Kumar Chandrappa, Shraman Gupta, Abdel Razik Sebak
A narrow slot antenna is excited by designing a radial substrate integrated waveguide (R-SIW) having TE 10 mode. The length of the narrow slot antenna is increased to achieve wide impedance bandwidth and is found to be 10.61%, after simulation. In order to further increase the performance of the narrow slot antenna, in terms of gain and the shape of the principal E-plane radiation pattern; an engineered layer consisting of metal strips and EBG are constructed on top of the R-SIW. The simulated results for the realized gain and the principal radiation patterns are presented, and are compared with the presence and absence of an engineered layer. A peak realized gain of 11.5 dB at 30 GHz and impedance bandwidth of 10.5% are observed from frequency range 28.6 - 32 GHz, for the narrow slot antenna including the engineered layer.
Rakibur Rahman, Satheesh Bojja- Venkatakrishnan, Elias A. Alwan, John L. Volakis
Communication links are vulnerable to signal fratricide and intentional interference. Therefore, there is a strong interest for interference resistant links to enable secure communication protocols. One way to achieve interference immunity is by exploiting Spread Spectrum (SS) coding techniques with significant coding gain. With access to large bandwidth, it is now possible to spread the signal below the noise floor and secure reliable communication. The focus of this paper is to present a Direct Sequence Spread Spectrum – Binary Phase Shift Keying (DSSS-BPSK) modulation link with over 1 GHz signal bandwidth, in presence of collocated multiple high power interferers. It is observed that DSSS results in better bit error rate (BER) performance. This improvement was in presence of an interferer-signal (I/S) ratio of 34.34 dB.
Ahmed S. Arman, Mohammod Ali, Terry R. Vogler
A combined antenna plus EBG circuit model is proposed to predict the isolation versus frequency response of monopole antennas with a single column Mushroom EBG (M- EBG) in between them. The existing circuit model for M-EBG structures is modified to include a new capacitance called plate capacitance. The new circuit model can predict the EBG stopband frequency more accurately than the existing model. The new circuit model is then combined with an existing monopole antenna circuit model to obtain the isolation versus frequency response.
Haoyang Zhang,
Metasurface with different reflection phases have promised great possibilities in realizing diffusion-like backward scattering. In this paper, metasurface with unit cells based on hyperuniform disordered structure is presented. It is proven to be able to reduce Radar Cross Sections(RCS) in comparison with its counterpart design based on metasurfaces from periodic distribution. V-shape antenna is used as unit cell and ’1’ bit coding metasurfaces based on hyperuniform disordered structure and periodic structure are designed respectively. Numerical results show that metasurface with hyperuniform disordered structure generate more diffusion, which demonstrate larger bandwidth and higher RCS reduction compared with the corresponding metasurface based on periodic distribution.
The need for larger bandwidths led the 5G to move to the frequencies in the millimeter wave bands. New challenges are posed to allow high gain antennas with considerable bandwidths to be used in both sensors and larger arrays. In this paper we present a four-element low profile microstrip slot antenna array, designed for 28GHz, which covers the 5G frequencies, exhibiting more than 9.5dBi of gain. This compact antenna can be integrated into a 5G system.
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