This brief presents a high-efficiency shared-aperture multiple antenna system. Unlike general antennas, the proposed system with size of $0.384 {\times } 0.384 0.171 {\mathrm {\lambda }} ^{3}$ makes high reuse aperture in two respecti...

This study presents a compact broadband wide-slot antenna with left-hand circular polarization compatible both LTE 42 and 43 standards of 5G mid-band applications. The proposed is fabricated on an FR4 dielectric substrate overall dimensions $0.41\lambda _{o}\time...

Owing to the shorter wavelength in millimeter-wave (mmWave) spectrum, miniaturized antennas can receive power with a higher efficiency than UHF bands, promising sustainable mmWave-powered Internet of Things (IoT) devices. Nevertheless, performance mmWave receiver has not been compared, numerically or experimentally, its sub6-GHz counterpart. In this article, receivers is evaluated based on nove...

Inline caches effectively eliminate the overhead implied by dynamic typing. Yet, inline caching is mostly used in code generated by just-in-time compilers. We present efficient implementation techniques for using inline caches without dynamic translation, thus enabling future interpreter implementers to use this important optimization technique— we report speedups of up to a factor of 1.71—with...

This position paper proposes the exploitation of type feedback mechanisms, or more precisely, polymorphic inline caches, for purely interpreting implementations of object-oriented programming languages. Using Squeak’s virtual machine as an example, polymorphic inline caches are discussed as an alternative to global caching. An implementation proposal for polymorphic inline caches in the Squeak ...

We describe a new quasi-optical SIS mixer designed for efficient radiation coupling. The mixer uses a twinslot antenna which has the advantages of a good beam pattern and a low impedance. The radiation and impedance characteristics of the antenna were obtained from a moment-method calculation. Tapered superconducting microstrip transmission lines are used to carry the radiation from the slot an...

Recent studies investigate single-antenna radio frequency (RF) systems mixed with terahertz (THz) wireless communications. This article considers a two-tier system of THz for backhaul and multiple-antenna-assisted RF the access network. We analyze performance by employing both selection combining maximal ratio receivers link integrated using fixed-gain amplify-and-forward protocol. develop prob...

A quad-element multiple-input–multiple-output (MIMO) antenna is designed at 433 MHz industrial, scientific, and medical (ISM) band, to increase the transmission data-rate minimize multipath fading. The proposed MIMO consists of semicircular meandered radiators with a shared ground. It optimized inside an implantable device in human head model. antenna’s results show 10 dB fractional bandwidth 3...

A substrate-integrated waveguide (SIW) antenna is an implementation of a in microstrip antenna. The antenna, as low-profile suffers from narrow impedance bandwidth. This paper proposes novel bandwidth enhancement method for solving Bandwidth was achieved by using quad-resonant frequencies. frequencies are resulted the hybrid half-mode (HMSIW) cavities between inner and outer cavities. HMSIW cav...

This paper compares the performance of a decode and forward relay assisted wireless uplink with direct wireless uplink in the presence of rayleigh fading where source is equipped with single transmit antenna (Tx), relay is equipped with multiple transmit and receive antennas (Rx), and destination has multiple receive antennas. Data are modulated using QPSK or 16 QAM or 64 QAM modulator at sourc...