The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Summary form only given. The characteristics of the uniplanar feed configuration to the rectangular dielectric resonator antenna based on the coplanar waveguide would be discussed. A comparative performance of the inductive, capacitive and the square loop feeds based on the coplanar waveguide would be addressed. It is observed that the capacitive feed to the antenna exhibits dual resonance with comparable...
Summary form only given. This talk presents several miniaturized RF components. The components reviewed are organized in two main categories, multi-band antennas and novel structures based on carbon nanotubes. Modern personal communication systems provide many services over several bands. They require antennas that are capable of operating over the desired frequencies. System designers may use any...
Summary form only given. The talk deals the development of various types of antennas (from VHF to Ka Band frequencies) required for satellites and their respective ground stations spanning from omni directional antennas to directional, shaped beam, multiple beam antennas for satellite applications and highly directional antennas with high G/T, low sidelobes and good axial ratio for respective ground...
In the present paper, the cross polarization reduction and improvement in the sidelobes have been discussed for a multiple beam offset parabolic reflector antenna illuminated by an array of uniformly excited tri-mode horns. The simulated secondary patterns have been obtained for a single tri-mode horn fed offset reflector and also for a tri-mode horn array fed multibeam offset reflector. The results...
In bio-medical applications and wireless communication systems, the microstrip antennas are extensively used due to their low-profile feature and ease of fabrication. With recent advances in electromagnetic computer-aided design (CAD), the design of microstrip antenna has been benefited from the utilization of accurate numerical methods. Recently the particle swarm optimization (PSO) was introduced...
In this paper the analysis and design of compact CPW-fed slot antenna that operates in the IEEE 802.11a frequency band from 5.15 GHz to 5.35 GHz for wireless applications through a single grounded coplanar waveguide port for achieving sectorized radiation pattern is presented. The antenna is designed on a RT/duroid 5880 substrate with a permittivity 2.22 and with the size of 18.8 mm times 12.3 mm...
Summary form only given. There has been a rapid technological growth in the field of antennas for space-borne, air-borne and ground based microwave sensors of passive as well as active types. The performance of the sensors largely depend on the radiation characteristics of the multifunctional antenna system. The development of these antenna systems pose a very challenging task in achieving the stringent...
In this paper, a neural network model is proposed which can be used for designing any monopole antenna whose element is square shaped and required to exhibit a wide band characteristics. All the antennas designed using this model shows a wideband response between 4.5 GHz - 5 GHz. This model is prepared using Feed Forward Back Propagation Algorithm. The results given by the prepared model are compared...
This paper describes the design and simulation of an Ultra Wide Band omni-directional antenna. The bandwidth of this antenna covers S, C, ext. C and X band frequencies. This bandwidth has been achieved by making a simple and easy modification in the design of a classical conical monopole (monocone) antenna. The achieved simulated results show stable radiation pattern over a specified field of view...
This communication presents an overview of the research work carried out related to microstrip antenna technology and Computational Electromagnetics in the Department of Electronics and Communication Engineering, Birla Institute of Technology, Mesra, Ranchi over the last few years. The communication also presents the identified areas of the research in the related field and discusses the various computational,...
The paper presents realization of portable offset antenna for 20/30 GHz SATCOM applications. A dual mode feed horn (TE11 & TM11 modes) has been used as feed for offset reflector antenna. Higher order modes generated in feed horn at 30 GHz has been taken care of, as transmit frequency band is far away from receive frequency band. Antenna system has been simulated on GRASP9 software [TICRA, Denmark]...
In this paper, design and development of broadband blade monopole antenna covering 0.5-1.5 GHz is presented with simulated and measured results. Blade monopole antennas are preferred antenna configurations for airborne platforms due to lower drag offered by them. The basic antenna element configuration is optimized by simulation studies using CST Microwave Suitetrade EM simulation software.
Electromagnetic Bandgap (EBG) structures can stop propagation of electromagnetic waves of certain frequencies and hence can be applied to the design of microstrip antennas. In this paper, we present a Rectangular Microstrip Antenna (RMSA) with an EBG structure in the ground plane. Hexagonal holes are etched on the ground plane which acts as the EBG structure. This whole structure is backed by a plane...
The simulated and measured results of a right triangular microstrip patch antenna (30deg - 90deg - 60deg) with and without air gap are presented in this communication. A right triangular patch antenna resonates at a single frequency but on application of small air gap of 1.5 mm between radiating patch and ground plane, it not only resonates at two frequencies but also shows marked improvement in its...
In this paper, the design and development of broadband, helical elements dipole antenna is presented. It offers higher gain compared to its conventional tubular elements counterpart of same physical dimensions. Both types of the dipole antennas, one with tubular elements and other with helical elements were constructed. These antennas were compared for their electrical parameters in the frequency...
The paper discusses the design of dielectric rod antenna at D band which can be used as a feed for dielectric lens antennas. This feed replaces the metallic corrugated / dual mode horns which are difficult to fabricate at these frequencies. Tapering of dielectric rod has been done to achieve low side lobe level. The designed antenna has been simulated on 3D EM software HFSS (high frequency structure...
Soft computing applications to antenna design are becoming the potential solution provider as reflected from the number of papers published in various journals. Resonant frequency of rectangular microstrip antenna having various substrate thicknesses are generally calculated using the standard expressions presented in literatures. In this paper, hybridizing bacterial foraging optimization technique...
In airborne application where size and space are a constraint, reduced height waveguide are used to design the slotted waveguide array antenna. For the monopulse operation the comparator is an integral part of the antenna. Even though the comparator design is well tuned and optimized, after fabrication and integration with antenna, certain discrepancies in terms of loss and phase are inevitable. Moreover...
A novel single feed miniaturized cross patch antenna radiating at three resonant frequencies is presented. Compared to standard rectangular patches, the proposed antenna gives an area reduction of 82%, 74% and 53% for the linearly polarized radiations with center frequencies at 1.2395 GHz, 1.515 GHz, and 2.027 GHz respectively. The antenna exhibits nearly omnidirectional radiation characteristics...
An Asymmetric Coplanar Strip (ACS) fed uniplanar antenna for wide band applications is presented. The resulting antenna offers a 2:1 VSWR bandwidth greater than 100% from 1.65 GHz to 5.06 GHz covering the DCS/PCS/IEEE 802.11a/WiMAX bands. The antenna has an overall dimension of 44 mm X 35 mm when printed on a substrate of dielectric constant 4.4 and height 1.6 mm. The wide band width is obtained by...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.