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This paper proposes a method of constructing an antenna array on the typical ground plane of the modern mobile terminal. An IFA and a slot in a metal frame antenna elements have been used to illustrate the proposed method. The radiation pattern of the element is recorded at the chosen number of the discrete locations on the ground plane. Antenna elements at the positions, where the boresight is similar...
Radarsat is a Canadian Synthetic Aperture Radar (SAR) system which will provide continually updated and global sea ice, geological, land and forest resource management data [1]. The first satellite will be launched in 1995.
The radial line waveguide slot array antennas have two types of slot array arrangement. The rotational mode feed structure uses the concentrically arrangement slot array which is the same slot length. It is possible to reduce the computational resource because it is good in each division to calculate the shape of the radiating slots. This art makes it is possible to large scale analysis which includes...
A 94 GHz two-dimensional (2D) millimeter-wave beam-scanning network using low temperature co-fired ceramic (LTCC) technology has been proposed. It utilizes two Butler Matrixes, four 3-dB directional couplers and four phase shifters to provide eight groups of phase difference on one dimension and four groups on another dimension. Combined with 2×4 SIW slot antenna array, it can achieve eight beams...
This paper describes the design and fabrication of a novel dual-band slotted waveguide antenna array for radar applications. The radiation structure is composed by two groups of slots, milled into the rectangular waveguide in opposite faces, enabling the antenna operation over two different frequency bands. Using this innovative structure becomes possible to perform diverse sorts of tracking using...
Multi-band antenna elements consisting of a loop slot for lower-band and two slots for higher-band are designed for cellular base station antennas. This antenna is fed by Tri-plate line to eliminate feeding coaxial cables and connectors of feeding network circuits and its frequency bands are 0.8/0.9 GHz and 1.7/2.0 GHz. This paper discusses the design method of multi-band polarization diversity array...
A slot array antenna is designed using ridge gap waveguide technology in two sub arrays. Each sub array is fed through a power divider which is designed on a separate ridge- groove gap waveguide. The coupling between two gap waveguides is conducted using coaxial transmission lines. The power divider of ridge-groove gap is fed using coaxial line that can provide a bandwidth of 22% at 14 GHz. The integrated...
Conventional slotted waveguide antennas are well known and prominently used for many military and even marketable applications. This is due to their different advantageous electrical and mechanical characteristics. It is also well known that this type of antennas is a typical array of slots with which the width of the main beam can be controlled in only one plane by using a different number of elements...
This paper presents a new high gain longitudinal slot array antenna based on substrate integrated waveguide (SIW) technology for millimeter wave application, which can achieve wide impedance bandwidth. Three prototype with impedance bandwidth lower than -10 dB from 60 to 65 GHz with a minimum 14dBi and maximum 27dBi peak gain are designed. Computed analysis results of the three designed arrays show...
A low cost 3-element sectorial fermi taper slot antenna configuration with sin-corrugation is designed at 28GHz. The elements can be illuminated individually based on the direction of the transmitter. In the proposed antenna structure each element produces a high gain of 15dB, a wide impedance bandwidth, a side-lobe levels less than -12.5dB, and an overall line of sight beam-width of +45 degrees....
This paper focuses on the direct computation of the interactions between the Macro Basis Functions (MBFs) defined on distinct sub-domains using their complex patterns. They are computed using a set of inhomogeneous plane waves, which can be viewed as an extension of the Fast Inhomogeneous Plane Wave Algorithm (FIPWA), using a new spectral-domain sampling. Examples of slot antennas and 3D frustum array...
This paper presents the design and numerical verification of a slotted waveguide antenna array (SWAA) that operates at 2.3 GHz, has an overall gain of 30 dB and is capable of handle high power (40 kW average). The array is going to be used as part of a narrow band high power microwaves (HPM) system capable of activate landmines from a safe distance. The numerical verification is made using CST Microwave...
In the paper, we describe a design of a slot antenna array feeding by a substrate integrated waveguide (SIW) resonator. The structure operates at the frequency 60 GHz in proximity of a human body. The study shows impedance matching and radiation properties of the designed antenna array and transmission properties of an on-body link, which can be influenced by interactions of electromagnetic waves...
This work concentrates on design of antennas in micrometer range that corresponds to infrared frequencies. The antenna is made to resonate around 10 micrometer range, which is the peak of IR radiations reaching the earth's surface. Various studies of different antenna designs were carried out and Bow-Tie antenna is selected as the final design based on its geometrical features that enhance the voltage...
Present paper describes the design of an iris excited centered slot as coupler in an iris excited center fed slotted array antenna. The design at 10GHz shows a better field and power flow symmetry around the junction of coupling slot. Thus mutual coupling due to soft and hard coupling can be addressed in a better way over inclined slot type coupler.
A practical high-performance waveguide slot array antenna in millimeter wave for monopulse tracking application is presented. At first, a novel compact architecture is developed to lessen the mechanical layers of the array. Several design parameters, including waveguide dimensions, wall thickness and slot width, are chosen to be helpful in dip-brazing process. Then the slot admittance, which taken...
Polarization multiplexing is an effective way to double the data rate of a 120-GHz-band wireless link. This paper presents 120-GHz-band antenna technologies for polarization multiplexing and describes a 120-GHz-band wireless link system that can transmit over-20-Gbit/s data, such as uncompressed 8K videos.
A multi-beam pillbox antenna system incorporating monopulse phase comparison technique is proposed in the 24-GHz band. The antenna architecture combines the scanning capabilities of pillbox couplers and enhanced resolution of the two-quadrant monopulse technique. This approach avoids mechanical orientation of the antenna system for tracking applications. The beam is scanned in E-plane over a field...
A 45° linearly polarized slot array antenna with balanced feeding network is proposed in this paper for automotive radar applications. The radiation element consists of one 45° inclined slot and two reflection cancellation vias. The balanced meandering feeding network proposed in this paper is able to achieve a relatively wide impedance bandwidth resulting from the traveling-wave propagation. In addition,...
Our efforts are being made to realize a high speed and high frequency utilization efficiency millimeter-wave band backhaul system for the purpose of applying it to the 5th generation (5G) mobile networks. We propose a fixed wireless access (FWA) system of full duplex radio communication (called the Directional Division Duplex (DDD) system) capable of simultaneous bi-directional communication of the...
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