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A differentially-fed omnidirectional circularly-polarized antenna is investigated for application in RF energy harvesting. The antenna is composed of a two-layer substrate and back-to-back printed square patches which have two diagonal stubs and one truncation. The patches share a common ground plane. Both patches generate circular polarization (CP) and omnidirectional CP is provided. The antenna...
This paper presents the utilization of the ADS Ptolemy system simulator for RF circuits and a ray tracing simulator for antenna and propagation, to compare performance of a given mmWave beamforming system of 28 GHz frequency band, 800 MHz bandwidth with different, i.e. 5°, 10°, and 20°, half-power beamwidth (HPBW) of base station antennas in outdoor-to-indoor propagation scenario. Simulation results...
This paper presents a review of the time filtering methods to eliminate echo in antenna measurements. Two different methods, FFT and Matrix Pencil, are compared and simulated in a Planar Near Field (PNF) where other effects, such as aliasing, can happen if the simulation is not carefully carried out. Finally both time gating methods are applied to different real measurement of several antennas in...
This paper presents integrated, distributed on-chip antennas. The aim is to achieve a higher system bandwidth due to the utilization of multiple antennas and the combining of their frequency ranges. All designs will be manufactured in the 130nm IHP SG13G2 process. Furthermore the measurement setup is described and measurement results are shown.
In this paper, design and simulation of unit cell structure of left-handed metamaterial (LHM) is presented. FR4 is used as a substrate whose height is 1.7mm with dielectric constant 4.4. The value of negative permittivity and permeability are obtained using Split Ring Resonator (SRR) and Capacitive Loaded Strips (CLS) respectively. Nicolson-Ross-Wier approach is been used for finding the double negative...
Broadband technologies are playing a very significant role in the information exchange world. There is a growing trend toward bandwidth-hungry applications driven by data/ video consumption and continuous availability of service. Applications in different areas like in-flight entertainment, maritime connectivity, industrial communications, cellular backhaul via satellite, Internet access to end user,...
A printed loop monopole antenna with wideband circular polarization is presented. The wideband circular polarization is achieved by asymmetrical excitation of hemicycle ground plane and planar loop monopole antenna. The combined radiation provides a wide axial-ratio bandwidth spanning from 1.73to 3.10GHz (54.8%). A parametric study of the key geometric parameters is given for the better understanding...
We propose a singly-fed planar inverted-F antenna (PIFA), with double-shorting planes and a tapered patch for radiating circular polarization. FEKO® simulations are employed to optimize the geometry of the antenna. The antenna prototype resonates at 2.52GHz and has a measured impedance bandwidth of around 240MHz. The calculated 3dB axial ratio bandwidth falls within the impedance bandwidth, demonstrating...
A new differentially fed circularly polarized (CP) patch antenna is designed. The proposed antenna operates at the 2.40–2.48 GHz industrial-scientific-medical (ISM) band whose center frequency is 2.45 GHz. Utilizing differential feeding, it can interface directly with radio frequency integrated circuits. Cutting asymmetry square-shaped slots on the radiating patch and truncating two cross-shaped slots...
Inis paper proposes the improved method 01 resource block group allocation to user's equipment (UE). This method resolves the disadvantage of Max C/I ratio method when single user station with highest SNR may occupy the channel for a long time.
The paper presents the DRA-Patch hybrid structure on photonic band gap substrate for bandwidth improvement. The DRA-Patch pair Structure is aperture coupled by micro strip excitation. EM fields to DRA are magnetically coupled by the slot fed by microstrip line. DRA of high permittivity material provided less loss EM fields. These fields have been coupled to microstrip patch placed above the DRA through...
This paper deals with the investigation of elements number effect of split ring resonator (SRR) based bandpass filter (BPF) to its characteristic. The proposed BPF is intended to operate at around frequency center of 2.4GHz for wireless applications. Three designs of BPFs with 1, 2 and 3 elements of SRR are investigated wherein each design of BPF is deployed on a Rogers RT/Duroid® 6010/6010LM™ dielectric...
This paper deals with design of planar Goubau line (PGB) antenna for partial discharge (PD) measurement. In the design, planar Goubau line antennas are simulated with a variety of shapes and sizes by using software HFSS to get the corresponding frequency response with the frequency of occurrence of PD. Planar goubau line antenna is designed with the type of substrate FR4_epoxy ranging from the size...
An electrical-balance duplexer (EBD) is a tunable RF front-end concept that seeks to address several key challenges of 4G and 5G mobile systems [1]. The basic principle is shown in Fig. 20.8.1. Duplexer isolation is achieved when the signals in paths 1 and 2 cancel and prevent the TX signal from appearing at the RX port. This cancellation is achieved by “balancing” the antenna impedance ZANT with...
In this paper, a coaxially excited dual band triangular dielectric resonator antenna (DRA) for WLAN application is presented. Two equilateral triangle shaped DRA, having εr=10.2 are excited simultaneously using a coaxial cable to resonate at 2.4–2.5GHz and 5.75–5.85 GHz bandwidth. The height of coaxial cable is varied and appropriately fine tuned to bring proper impedance matching. The performance...
Traditional fronthaul (FH) solutions are not efficient and scalable enough to enable large-scale Cloud RAN deployment and to support 5G evolutions. In this paper we proposed a new fronthaul interface call Next Generation Fronthaul Interface (NGFI). The design principles of the NGFI are described including decoupling the FH bandwidth from the number of antennae, decoupling cell and user equipment processing...
Abstract-In this paper, we consider a mixed RF and hybrid RF/FSO system where several mobile users transmit their data over an RF link to a relay node (e.g. a small cell base station) and the relay forwards the information to a destination (e.g. a macro cell base station) over a hybrid RF/FSO backhaul link. The relay and the destination employ multiple antennas for transmission and reception over...
Factory automation is one of the challenging use cases that the fifth generation, 5G, networks are expected to support. It involves mission-critical machine-type communications, MTC, with requirements of extreme low-latency and ultra-reliable communication to enable real-time control of automation processes in manufacturing facilities. In this paper, we discuss the deployment strategies for the 5G...
In this paper, we report the design, fabrication, and experimental measurement of a compact co-designed circularly polarized (CP) filtering antenna with a wide operational bandwidth. In the filtering antenna module, the radiator serves simultaneously as the last resonator of the filter which was realized by coupled stripline open-loop resonators. A proof-of-concept design is presented with both its...
This paper presents a new LTE antenna design with its frequency switchable in low band to have a low profile for tablet application. The antenna is formed by a T-shaped monopole strip, a shorted L-shaped strip and an L-shaped strip integrated with a switchable matching circuit. The bandwidth of the proposed antenna can cover LTE 700/850/900/1500/1800/1900 /2100/2300/2500 bands operation. Details of...
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