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The evolution of Wireless Body Area Network (WBAN) is made possible due to the rapid growth of wireless network and constant miniaturization of electrical devices. However, designing an antenna that is suitable for WBAN applications is challenging as the antenna should has compact size, in addition to the ability to endure low power loss during transmission and has robust communication link. Thus, a miniaturized wearable Dielectric Resonator Antenna (DRA) capable of radiating circularly polarized (CP) wave is designed. The antenna designing is done by using CST software. A total of 140 simulations is simulated in order to obtain the desired results. The DRA is used, together with conformal copper strips and miniaturized copper ground plane. The single point fed antenna is excited by a unique capital F-shaped conformal copper strips. The CP DRA offers a simulated Axial Ratio bandwidth below 3dB of ~23.85%, which is much greater than what has been reported in the previous work, with bandwidth of S11 below −10dB ~ 16.066%. In addition, the antenna designed in this research project managed to achieve an overlapped bandwidth of ~14.10% (6.9GHz – 7.94GHz). A prototype antenna is fabricated to validate the simulation result. Thus, the antenna design in this research will be helpful towards the evolution of the WBAN.

A 1×2 array microstrip patch antenna with defected groundplane structure (DGS) has been designed and simulated. This antenna design is intended for power harvesting application. Several simulation steps have been conducted such as simulating single microstrip antenna without DGS, then simulating single microstrip antenna with DGS, and simulating 1×2 array microstrip antenna without DGS. The last simulation yields wider bandwidth but the gain is still low. Antenna design still needs improvement to fulfill power harvesting requirements.

Recently the development of technology in telecommunications system, especially Digital Television (DTV), is growing very rapidly. In Indonesia, the adopted technology is Digital Video Broadcasting Terrestrial Second generation (DVB-T2) and has been utilized since 2012. It uses the UHF frequency range that is same with analog television. One device that is used to support DVB-T2 application is the antenna. It should inherit wide enough bandwidth as well as high gain to obtain good performance in receiving the DTV signal. In this paper, design of a linear triangular microstrip patch array antenna for DTV application is proposed. The design is adopting CPW-fed, parasitic patch and air gap methods to obtain wide bandwidth and relatively high gain. The proposed antenna has been fabricated and measured. The actual obtained bandwidth of this antenna is about 400.2 MHz. The value of VSWR, return loss and gain is of about 1.25, −18.79 dB, 3.21 dBi respectively, and has a unidirectional radiation pattern with elliptical polarization. The proposed antenna has been used to receive DTV signals and showed good results.

Array antenna has been utilized in many radio telescope systems, especially for low frequency transient observation, to increase their resolving power. In this paper, a new method to determine the maximum resolving power of an array radio telescope based on the single antenna beamwidth is proposed. The method is derived from theoretical calculations combined with simulations. Statistical result shows that the equation inherits a standard error of 0.99, and hence is suitable to be used for rough calculation in determining an array maximum resolving power. It also can be used to estimate the maximum resolving power of an interferometer system with a slightly lower precision at very long baseline.

Dipole-based antenna has been widely used as the front end section of a radio telescope system, especially for low frequency observation. In this paper, a new method on designing dipole-based antenna for transient radio telescope system is presented. The method consists of three equations which were derived from statistical approach, by utilizing data from many antenna designs for different operating frequencies. Some of the designs have been constructed and measured, with frequency peak error down to 0.7%. These antennas have been utilized in some radio telescope systems, operated at National Space Center of Malaysia for solar monitoring.

Defected Ground Structure (DGS) has been introduced and used in developing microstrip patch antenna. DGS is implemented by etching off a shaped in the ground plane. In this paper, multi rings shaped DGS has been analyzed for WiMAX application at 3.65 GHz operating frequency. The effect on variation in the parameter study such us diameter of the rings, the width of each rings and introducing the gap on the ring the DGS antenna exhibits a reduction of 64.062% compared to the size of conventional antenna. The DGS method is suitable for mobile antenna application.

The dipole-based antenna has been employed in many radio telescope systems. By utilizing this type of antenna, the possibility to conduct all sky monitoring and high spatial resolution observation in the same time can be provided. In this research, a new dipole-based antenna system will be developed for 21cm line observation. The dipole-based antenna is optimized in terms of standing wave ratio (SWR), gain and beamwidth. Initial results show a good achievement on SWR level, down to 1.005.

Dipole-based antenna has been used in many radio telescope systems, especially for low frequency astronomical observation. In this paper, analysis on beamwidth and gain of V-shape dipole-based antenna for different applications in radio astronomy observation is presented. Parameters to obtain wide and narrow field of view, up to 134°, down to 94°, are achieved with simple structures. Possibility to trade the beamwidth and gain off with higher sensitivity is also provided as low standing wave ratio down to 1.008 has been achieved. The results show different structures suitable for different applications in radio astronomy.

Design and development of antenna array for low frequency radio telescope has become one fascinating research in the field of Astronomy. In this research, optimization of two-element multiband antenna array for low-frequency transient radio telescope is presented. Narrow beamwidth down to 14 degrees has been achieved with maximum gain up to 12.31 dBi. The array is suitable to be used in a radio telescope system for solar and transient object monitoring.

Development of antenna for a radio telescope system has become a fascinating research area in the field of radio astronomy. In this paper, a design of compact multiband VHF antenna for a transient radio telescope system is proposed. The multiband has been achieved by combining V-shape half-wavelength dipole, traps and parasitic elements. Return losses of about −12.45 dB, −25.15 dB and −29.42 dB are obtained at three different frequencies, where the maximum gains are achieved at zenith direction for all operating frequencies. The proposed antenna is suitable to be used in a transient radio telescope which is operated in urban centers.