A multiwideband bandpass filter (MW-BPF) using a quad cross-stub stepped impedance resonator (QC-SSIR) was simulated, fabricated, and measured. The proposed QC-SSIR is designed on a four-series arrangement of crossed open stub (COS) structures where each open stub is developed with a step impedance resonator (SIR) structure to generate a wide bandwidth. Compared to the COS resonator, the QC-SSIR has a wider fractional bandwidth and good transmission coefficients and is compact. ABCD matrix analysis is used to investigate the filter structure. Furthermore, the MW-BPF is designed on an FR4 microstrip substrate with εr = 4.4, thickness h = 1.6 mm, and tan δ = 0.0265. The results show that the proposed MW-BPF using a QC-SSIR achieves transmission coefficients/fractional bandwidths of −0.60 dB/49.3%, −1.49 dB/18.7%, and −1.93 dB/13.9% at 0.81 GHz, 1.71 GHz, and 2.58 GHz, respectively. Furthermore, to reduce the filter size, a folded QC-SSIR (FQC-SSIR) structure was also proposed. The results show that the proposed MW-BPF using an FQC-SSIR achieves transmission coefficients/fractional bandwidths of −0.57 dB/49.6%, −1.21 dB/17.7%, and −1.76 dB/12.5% at 0.82 GHz, 1.80 GHz, and 2.62 GHz, respectively. The size of the proposed MW-BPF using an FQC-SSIR is reduced by up to 46% compared with the MW-BPF using a QC-SSIR. Finally, the performance of the simulated MW-BPF based on the QC-SSIR and FQC-SSIR was in good agreement with the measurement results.
Changing times require people to be able to keep up with technological developments. One of technologies that plays a big role in changing people’s patterns and lifestyles are electronic technology. The development of electronic technology requires human resources who have competencies that are in accordance with the needs of society and industry. Based on observation survey had been done to Rancagong people, they haven’t understand about electronic too much. So that it’s worth to be done the community service at the location. Several subject matters are soldering practice, LED assembly: Seri and Parallel, LED Blinking Assembly, Assembly of Lighting Sensors Automatically and Amplifier Assembly. Implementation of community service involve lecturers/intructors as embodiment in college obligations. In addition, this activity also involves students in order to get experiences and lesson learned directly. Perubahan zaman menuntut masyarakat untuk dapat lebih mengikuti perkembangan teknologi. Salah satu teknologi yang memegang peranan sangat besar dalam mengubah pola dan gaya hidup masyarakat adalah teknologi elektronika. Berkembangnya teknologi elektronika tentunya membutuhkan sumber daya manusia yang memiliki kompetensi yang sesuai dengan kebutuhan masyarakat dan industri. Berdasarkan hasil observasi yang dilakukan terhadap masyarakat Desa Rancagong, belum banyak masyarakat yang mengerti di bidang elektronika sehingga layak untuk dilakukan kegiatan pengabdian masyarakat di lokasi tersebut. Dalam kegiatan pengabdian kepada masyarakat ini dilakukan beberapa hal yang akan menjadi solusi permasalahan yang ada di Desa Rancagong guna membuka peluang kewirausahaan, diantaranya pelatihan praktek penyolderan, perakitan rangkaian LED seri dan pararel, perakitan rangkaian blinking LED, perakitan rangkaian sensor cahaya otomatis dan merakit amplifier. Pelaksanaan kegiatan ini melibatkan dosen/instruktur sebagai wujud dharma perguruan tinggi. Selain itu kegiatan ini juga melibatkan taruna/taruni sebagai pengalaman lapangan dan media pembelajaran secara langsung.
Salah satu jenis alat navigasi penerbangan yaitu Non Directional Beacon (NDB). NDB beroperasi pada frekuensi rendah 175 KHz – 535 KHz yang berfungsi untuk memberikan informasi heading dan azimuth pesawat terhadap ground station NDB yang berada baik di dalam maupun di luar lingkungan bandara. NDB merk Nautel ND200S, baik pada konsol maupun monitoring masih bersifat analog dan manual, sehingga butuh akses langsung ke lokasi untuk melakukan monitoring parameter. Selain itu tidak terdapat alarm yang bersifat remote apabila terjadi gangguan pada peralatan. Dengan menerapkan karakteristik industri 4.0 berbasis industrial Internet of Things (IoT), maka dirancang system kendali dan pemantauan dengan mengadopsi sistem tersebut menggunakan mikrokontroller NodeMCU ESP8266. Perangkat ini terdiri dari hardware antara lain NodeMCU ESP8266, resistor, analog to digital converter ADS1115, Driver ULN2003, Stepper Motor BY28J yang di program pada software Arduino IDE dan Blynk App. Perangkat ini dapat dikendalikan dan dimonitor secara wireless selama terhubung dengan koneksi WiFi sesuai dengan program yang dibuat.
Water is essential for life, but not all people can access tap water. In fact, many people use ground water, which is not measured its purity, to supply household, places of worship, public facilities, private offices, government offices, and etc. This problem was also observed on Al-Ikhwan Mosque building Jl. Masjid RT 01 RW 08 Rancagong Village, Legok District, Tangerang Regency, Banten Province. In addition, in this place the water installation was not available. Therefore, it was feasible to carry out community service activities in that location regarding to clean water supply and installation. The method of this project were (1) drilling to make wells as clean water supply, (2) Calculating the need for clean water as the basis in determining the capacity and the type of water pump, (3) building water storage (equipped with a floating sensor as a control media turn the pump on or off automatically), and (4) piping to support distribution system of clean water from well to tap. This method was expected to meet Indonesian National Standard of clean water installation system. This project was supported by lecturers / instructors as their responsibility to practice Tridharma of higher education. Cadets/students was also involved in this project so they can demonstrate their knowledge about standard of building facilities in society.
Changes and developments in the times of society are required to be able to keep abreast of technological advances. The development in the field of electronics technology certainly requires human resources who have competence in accordance with the needs of society and industry., the results of observations carried out on the Serdang Kulon village, there are still many community members who do not understand the field of electronics so it is very necessary to carry out community service activities the community in that location. In this community service activity, several things were carried out which were expected to be a solution to problems in the village of Serdang Kulon, namely the Audio Amplifier Assembly Workshop to Improve the Electronics Skills of the Residents of Serdang Kulon Village, Panongan District, Tangerang Regency. With activity material: basic electronics theory (basic electronic components, basic electrical science, electronic circuits) , soldering practice, assembling series and parallel LED circuits, assembling LED blinking circuits, assembling automatic light sensor circuits and assembling audio amplifiers. The implementation of PKM activities involves Lecturers and Cadets and stakeholders as a form of Higher Education Dharma. In addition, this activity is also a field experience and direct learning media for students/cadets.
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