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A low cost, compact size staircase rectangular-slot antenna fed by a square patch is presented in this paper. This antenna has broad bandwidth between 2.5 - 5.0 GHz, low loss, and omnidirectional radiation pattern. The structure of this antenna is similar to the conventional rectangular-slot antenna but the staircases are added to the border of the rectangular-slot to increase its bandwidth performance...
In multiple input multiple output (MIMO) communication systems, the rate of data transfer can be increased with increasing number of simultaneously transmitting and receiving antennas. Antenna selection is essential in MIMO transceiver systems. With effective selection algorithms, the signals with the highest quality can be selected over the range of various arriving signals. Many algorithms has been...
Multiple antennas system is used to replace traditional single antenna circuitry in radio transceiver system in order to improve transmission capability and reliability. With multiple antennas, data transfer rate can be increased by a factor of n, where n is the number of antennas used in the transceiver. To avoid the uses of multiple RF chain associated with the multiple antennas, an antenna selection...
Communication devices such as cordless phones, mobile phone, local area network (LAN), and personal communication systems (PCS) play an important role in our daily life. The rate of growth in wireless communication applications is trended to be raised sharply causing competitiveness in this technology. Consequently, antenna designs need to be improved. Our project proposes a novel dual band microstrip...
Parallel coupled-line filter covers odd and even wave coupling of transmission lines. Cascading parallel coupled-line sections gives rise to a bandpass filter structure. Since conventional parallel coupled-line filter has poor spurious response and isolation performance, step impedance technique is added to improve its performance. A new Zig-Zag diplexer filter using stepped-impedance resonators is...
In RF transceiver, the RF switch is used to select the operation for an antenna between working as a receiver or transmitter. Each mode of operation generates some loss due to the transistors used in the switching operations. Therefore it is essential to design a switch that has minimal impact on the signal. This paper proposes a 2.4 GHz CMOS T/R (Transmit/Receive) Switch with low insertion loss and...
Coupled filter design covers the odd and even wave coupling of transmission lines, which results in odd and even characteristic line impedances. Cascading the parallel coupled-line sections gives rise to bandpass filter structures. Since conventional coupled-line filter is large in size, it is not suitable for wireless communications. Hairpin- comb and zig-zag filters were introduced to solve this...
Telecommunication devices are getting smaller and smaller, thus the size of the antenna which is the heart of the communication must be small too. Microstrip antenna was developed to fit this criteria. In this paper, a new E-shaped driver based on the quasi-Yagi antenna is presented. This microstrip antenna is realized on a dielectric-constant substrate with epsir = 4.4. The size of the new proposed...
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