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Showing 1 to 20 of 24 for “"Slot antenna"”.
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Cavity-backed T-fed slot antenna
Cavity-backed slot antennas are experiencing a revival because of the ever-increasing need for low-profile and conformal antennas which have a low radar cross section out of their operating frequency bands. Like thin microstrip patch antennas, cavity-backed slot antennas typically have a narrow …
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Substrate Integrated Waveguide Horn Slot Antenna Array
… filters, power dividers, circulators, and antennas. Here, full wave analysis is used to design microwave components such as power dividers, T-junctions and right angle bends. Then a transmission line concept is used to construct a feeding network based on these components to speed up the …
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Arrowhead patch slot antenna for 5G applications
… standards into 5G systems is growing. The antenna is an essential part of the system to ensure communication quality. Therefore, research on antennas and arrays suitable for the 5G frequency bands is of great significance for future wireless communication systems. This thesis reviews recent …
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A frequency reconfigurable slot antenna with a conductive microfluidic switching mechanism
Reconfigurable antennas have the potential to provide functionality to radio systems which will make them more robust and allow for much more efficient use of the electromagnetic spectrum when combined with cognitive radio. High power applications, however, cannot benefit from the advances made in …
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Analysis of a Log-Periodic Cavity-Slot Antenna Using Three-Port Networks
Made available in DSpace on 2014-12-08T22:24:17Z (GMT). No. of bitstreams: 1 6801808.pdf: 4601906 bytes, checksum: 8ab879d5255d2c45b723bee0bc96f672 (MD5) Previous issue date: 1967
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Design and Analysis of an Electronically Steerable Microstrip Patch and a Novel Coplanar Waveguide (CpW) Fed Slot Antenna Array
<p>Conformal Phased Array Antennas (CPAAs) are very attractive for their high gain, low profile, and beam scanning ability while being conformal to their mounting surface. Among them are microstrip patch phased arrays and wideband slot phased arrays which are of particular significance.</p> <p>In …
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Impact of ground plane serrations on radiation and impedance characteristics of a slot antenna over a conductive back plane
… are necessary qualities for RFID and wearable antennas as well as those used in many other applications. An antenna can be made indifferent to the material on which it is placed by shielding it with a conductive back plane. Slot antennas and planar dipole antennas are common choices for thin, …
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Small, dual band, placement insensitive antennas
… properties. This limitation stems from the antenna choice for these labels - a dipole variant. The slot antenna, the effective inverse of the dipole, is shown to be an effective RFID antenna for environment-independent peel-and-stick applications. A miniaturization and multi-band design …
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Bandwidth enhancement techniques for low-profile antennas: Theory and experiment
… for bandwidth enhancement for low-profile antennas. The first method involves the use of coupled resonators. In particular, two cavity-backed slot antennas are coupled through an aperture in a common wall. One cavity-backed slot antenna, of the coupled antenna system, is driven. This …
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Design and characterisation of wideband antennas for microwave imaging applications
… frequency. This research is to design an antenna for microwave imaging, namely corrugated u-slot antenna at 1.17-5.13 GHz with the reference of S11 less than -10 dB. Two corrugated u-slot antennas; namely antenna 1 and antenna 2 are placed on a mirror side of skull phantom to examine their …
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Size reduction of vivaldi antenna array for microwave imaging
UWB antennas with compact size, stable patterns of end-fire radiation and high gain find many of applications such as radar, microwave imaging, remote sensing. To achieve these goals, a compact-sized end-fire slot antenna (TSA) is a good candidate as it offers broad impedance bandwidth and stable …
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A Compact RF/Photonic Antenna using a Quantum Dot Mode Locked Laser as a Source
… on achieving an active compact RF/Photonic antenna module based on a broadband antenna design integrated with a quantum dot mode-locked laser (QDMLL). A two-section QDMLL is used to produce pulsed microwaves signals to feed the radiating antenna. To realize the microwave signal radiation …
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ANALYSIS AND DESIGN OF BROADBAND AND DUAL BAND MICROSTRIP ANTENNAS
The concept of using microstrip antennas to provide printed radiating structures, which are electrically thin, lightweight, and low cost, is a relatively new and exciting development in antenna engineering. The application of this phenomenon to design useful antennas started only in the early 1970s …
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Antenna-coupled Tunnel Diodes For Dual-band Millimeter-wave/infrared F
… of overall size and weight. We have developed antenna-coupled sensors that respond simultaneously at 30 THz and at 94 GHz, utilizing electron-beam lithography. Slot-antenna designs were found to be particularly suitable for coupling radiation into metal-oxide-metal (MOM) tunnel diodes at both …
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Synthetic aperture radar-based techniques and reconfigurable antenna design for microwave imaging of layered structures
… microwave imaging systems require suitable antennas for signal transmission and data collection. A reconfigurable antenna which its characteristics can be dynamically changed provide significant flexibility in terms of beam-forming, reduction in unwanted noise and multiplicity of use …
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Antenna-coupled Infrared And Millimeter-wave Detectors: Fabrication, Measurement And Optimization
Antenna-coupled detectors provide uncooled, cost-effective solutions for infrared and millimeter-wave imaging. This work describes the design, fabrication, measurement, and optimization of several types of antenna-coupled detectors for LWIR (8 - 12 µm) and 94 GHz radiation. Two types of …
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Theory and Applications of Multiconductor Transmission Line Analysis for Shielded Sievenpiper and Related Structures
… is presented: a compact unidirectional ring-slot antenna utilizing the shielded Sievenpiper structure is constructed and tested.
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Time-Variant Components to Improve Bandwidth and Noise Performance of Antennas
… Thus, the design of low-noise devices (such as antennas, amplifiers, and filters) is essential to increase the communication range. Also, it is well known that the noise performance of a receiving radio is primarily determined by the frontend including the antenna, filter, and a low-noise …
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Analysis and design of planar slot antennas for RFID applications using characteristic mode theory
… room and reads information from a passive tag antenna. These systems have been implemented in the LF (12 {13 KHz), HF (13 MHz), UHF (860 { 960 MHz) frequency bands. Most RFID tags in the LF and HF use simple loop variants to achieve magnetic coupling between the reader and the tag and have …
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