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.
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...
Mutual coupling is an important factor for the study of multiple-input multiple-output antenna system. A study of the effect of mutual coupling between the antenna elements of MIMO system has been performed. We focus on the userpsilas spectral efficiency and data throughput where coupling environment is present. A key contribution of this paper is a simple MIMO structure that offers higher spectral...
In this contribution we propose design of a Micro strip patch antenna for L-Band SAR applications. The system cost in smart antennas increase due to requirement of powerful Digital Signal Processors for adaptive and computationally intensive beam forming in every separate element chain of Smart-antenna transceiver array. The smart antennas with reasonably higher gains are needed as we have to keep...
This paper presents the design and development of sequentially rotated broadband circularly polarized stacked patch array antenna for data & voice communication in MSS service. A Sequential rotation technique is used for improvement in axial ratio in 2 times 2 array environment. The driven element is Electromagnetically Coupled square patch with dual edges fed by T power divider. A parasitic patch...
This paper presents the design of 256 (16 times 16) elements planar microstrip array antenna at K-band frequencies using corporate feeding network. The array antenna has been designed and developed for miniaturized satellite communication (SATCOM) ground terminals. The impedance bandwidth achieved for VSWR Lt 2.0 is 540 MHz (~ 2.7%). The achieved mid-band gain of the array antenna is about 29 dBi...
A very practical radiator in the HF (3-30 MHz), VHF (30-300 MHz) and UHF (300-3000 MHz) is Yagi-Uda antenna. The radiation characteristics that are usually of interest in the Yagi -Uda antenna are the forward and backward gains, input impedance, bandwidth, front to back ratio, VSWR and magnitude of minor lobes. In this paper the 4-element Yagi-Uda antenna is investigated for the frequency of 435 MHz...
This review paper envisages use of multiple antenna elements in wireless communication over frequency non-selective radio channels. Various upcoming transmit strategies are discussed and compared to existing strategies such as beam forcing and space time block coding. It is revealed through this paper that the performance of transmission algorithm is largely dependent on channel characteristics such...
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.