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The impacts of numbers of gate fingers on large signal of High Electron Mobility Transistor (HEMT) were studied in this paper. The analysis was carried out measurement using Maury Automated Tuner System (ATS) at frequency of 2.4 GHz and 5.8 GHz. The measurement results shows that the transistor that has higher number of gate fingers is less preferred for high P1dB compression and Power Added Efficiency...
In this paper, we present a short-range point-to-point gigabit wireless transmission at 50 GHz utilising prototypes of simple transmitter and receiver front-ends. The particular prototypes have been assembled from millimetre-wave (MMW) components with WR15 and coaxial ports. The MMW transmitter generates an amplitude shift keying (ASK) modulated signal by mixing a polar non-return-zero (NRZ) of pseudo-random...
This paper presents measurement of 4times4 MIMO channel by using polarization diversity technique at 2.4 GHz. The measurement was carried out in indoor wireless environment and line-of-sight (LOS) condition. A linear polarization antenna was used at the transmitter (Tx) and receiver (Rx) with a distance of 3 meters. The results were compared with power correlation coefficient of different polarization...
In this letter, the design of inset fed microstrip antenna is proposed at 45deg and -45deg to achieve the optimum performance of the return loss, antenna gains and polarization loss. A design of the broadband dual-polarized microstrip antennas is proposed by using the simply inset feed technique but slant at desired rotation. In most applications, the requirement of propagation can be met with a single...
In this paper, the meander line antenna (MLA) have been designed to operate at 2.4-GHz for WLAN application. Two different designs of meander line antenna are investigated, without conductor line and with conductor line. Microwave Office software is used for simulation designed process. The antenna is fabricated on a double-sided FR-4 printed circuit board using an etching technique. Then the design...
This paper present 3 design of array antenna from type of inset-fed microstrip patch antenna oriented at 45deg and -45deg. The antenna is capable to generate dual-polarization radiation pattern slanted at 45deg and -45deg. Combinations of two and more patches using quarter-wave impedance matching technique have been used to design the array antenna operate at 2.4 GHz. The design were simulated using...
In recent years, wireless telecommunications have become more important. While signal processing and coding is important for wireless telecommunication, multiple input multiple-output (MIMO) channel characterization is a major factor to improve the performance. This paper will focus on MIMO channel characterization and optimization. The characterization of the MIMO channel in different scenarios and...
In this paper, the meander line antenna (MLA) have been designed to operate at 2.4-GHz for WLAN application. Two different designs of meander line antenna are investigated, without conductor line and with conductor line. Microwave Office software is used for simulation designed process. The antenna is fabricated on a double-sided FR-4 printed circuit board using an etching technique. Then the design...
This paper present the results and performance of angle diversity for direction of arrival (DOA) setup. The 4times4 Butler matrix was been used at transmitter and receiver sides. The 2times2 rectangular patches have been used as a transmitter and receiver medium for wireless transmission. The operating frequency for this measurement is 2.4 GHz in WLAN application. This paper analyze about DOA and...
This paper present 3 designs of array antenna from type of inset-fed microstrip patch antenna oriented at 45deg and -45deg. The antennas are capable to generate dual-polarization radiation pattern centered at 45deg and -45deg. Combinations of two patches using quarter-wave impedance matching technique has been used to designs the array antennas operate at 2.4 GHz. The designs are simulated using Microwave...
In this paper, the meander line antenna (MLA) have been designed to operate at 2.4-GHz for WLAN application. Two different designs of meander line antenna are investigated, without conductor line and with conductor line. Microwave Office software is used for simulation designed process. The antenna is fabricated on a double-sided FR-4 printed circuit board using an etching technique. Then the design...
This paper present 3 design of array antenna from type of inset-fed microstrip patch antenna located at 45deg and -45deg and capable to generate dual-polarization radiation pattern. Combinations of two patches using quarter-wave impedance matching technique have been used to design the array antenna operate at 2.4 GHz with return loss (RL) less than -10 dB. Those design were simulated using Microwave...
A beamforming network using Butler Matrix technique at WLAN application is presented. This paper describes the design, simulation and fabrication of a 4 times 4 Butler Matrix for the 2.4 GHz (WLAN). A Butler Matrix is a multiport component which when loaded with radiating elements enables production of a beam of microwave energy in a specified direction in transmission line, dependent upon which input...
In this paper, the meander line antenna have been designed to operate at 2.4-GHz for WLAN application. Two different designs of meander line antenna are investigates, without conductor line and with conductor line. The Microwave Office software is used for simulation design process. The antenna is fabricated on a double-sided FR-4 printed circuit board using an etching technique. Then the design has...
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