A planar dual-band monopole an for Global System for Mobile Communicat applications, which also have the potential to harvesting system. The proposed antenna com plane at the back of the FR4 substrate and thr which are physically connected with each other of the substrate. The monopole antenna achiev at resonance frequencies of 915 MHz and bandwidth value of 124.2 MHz and 196.9 MH antenna gains of 1.97 dB and 3.05 dB are ach frequencies of 900 MHz and 1800 MHz. Ex show good agreement with simulated perform from the receiving antenna is also observed i the relationship of the power level and the transmitting and receiving antenna. This s investigation in designing the RF energy ha support green technology and sustaina particularly for Wireless Sensor Network (WSN Keywords-Dual-band; monopole; GSM b gain I.

This paper presents compact structure of bandpass filter integrated with Defected Microstrip Structure (DMS) to produce band-pass and band reject response simultaneously. The filter design based upon g0 short-circuited stubs structures of 7 th degree. The narrow notch responses produced by DMS was introduced at a frequency of 5.2 GHz in order to reject any undesired signals which may interfere with the wideband communication systems. The design was simulated and fabricated on a Roger Duroid RO4350 with a thickness of 0.508 mm and dielectric constant, r of 3.48. The group delay in the passband was lower than 0.74 ns. This type of filter is useful in any RF/ microwave communication systems particularly to eliminate any undesired signals in wideband spectrum. While maintaining its excellent performance, the overall physical and cost reduction can also be achieved using this technique.Index Terms-Microwave filter, bandpass, band-reject, Defected Microstrip Structure (DMS), group delay.

Microstrip slotted meander line antenna with diverse number of meander slots is presented for 2.4 Wireless Local Area Network (WLAN) application. The proposed antenna comprises a rectangular microstrip patch element embedded with several numbers of meander slots in many positions. The parametric study is performed to investigate the characteristic of these microstrip patch antennas with different numbers of meandered slots. Many designs of slotted meander line antenna are produced and they are analyzed based on the number of slotted meander line used. Antenna wit slotted meander lines has the most size reduction of approximately 23% of the original size. This study is an early investigation in designing the RF energy harvesting to support green technology and sustainable development particularly for Wireless Sensor Network (WSN) as well as Radio Frequency Identification (RFID) applications.

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