Design of Compact Microstrip U Shape Bandpass Filter Using Via Ground Holes

This paper present the microstrip bandpass filter using two U shape resonators with using via ground holes. The bandpass filter was established using two U shape resonators with using via ground holes and deployed on RT/duroid 6010 LM aims to minimize the dimension of filter. The proposed filter was characterized using software simulation. The characteristic of proposed filter is to deal with required specification. Hardware realization was done to verify the characteristic of proposed filter. The bandpass filter has the dimension of 4.2 mm x 3.8 mm. The filter was expected to have center frequency of 400 Mhz with minimum 3dB bandwidth of 15 Mhz, maximum insertion loss of -1.5 dB and VSWR less than 2. VSWR and 3dB bandwidth on realized filter have a good agreement with required specification. However the insertion loss and center frequency was not adequate. The realized filter has insertion loss of -2.554 dB with the center frequency of 404.711 MHz

Compact Power Divider Integrated with Coupler and Microstrip Cavity Filter for X-band Surveillance Radar System

This paper present the compact power divider integrated with coupler and microstrip cavity filter for x-band surveillance radar system. These modules consist of several devices (splitter, filter and coupler) it is integrated in a single module aims to reduce the loss in the joint connectors. The bandpass filter is use microstrip cavity filter for operating on X-Band Frequency and deployed on RT/duroid 5880. The power divider and coupler is designed using quarter wavelength transformer. A theoretical analytical circuit model will be presented, from the theoretical model, a compact integrated module will be designed and simulated. The proposed compact integrated module is small in dimension and performs a compact size. The compact integrated devices design on X-Band frequency is simulated and the result is presented

Design and Implementation of IoT-Based Monitoring Battery and Solar Panel Temperature in Hydroponic System

Hydroponics is currently widely used for the effectiveness of farming in narrow areas and increasing the supply of food, especially vegetables. This hydroponic technology grew until it collaborated with the internet of things technology, allowing users to monitor hydroponic conditions such as temperature and humidity in the surrounding environment. This technology requires electronic systems to obtain cost-effective power coverage and have independent charging systems, such as power systems using solar panels, where the power received by solar panels from the sun is stored in batteries. It must ensure that the condition of the battery and solar panels are in good condition. The research contribution is to create a solar panel temperature monitoring system and battery power using Grafana and Android Application. Apart from several studies, solar panels are greatly affected by temperature, which can cause damage to the panels. If the temperature is too high, the battery and panel temperature monitoring system can help monitor the condition of the device at Grafana and Android application with sensor data such as voltage, current, temperature and humidity that have been tested for accuracy. Accuracy test by comparing AM2302 sensor with Thermohygrometer and INA219 sensor with multimeter and clampmeter, both of which have been calibrated. The sensor data gets good accuracy results up to 98% and the Quality-of-Service value on the internet of things network is categorized as both conform to ITU G.1010 QOS data based on network readings on the wireshark application. QOS results are 0% Packet loss with very good category, 14ms delay with very good category and Throughput 71.85 bytes/s.  With the results of sensor accuracy and QOS, the system can be relied upon with a high level of sensor accuracy so that environmental conditions are monitored accurately and good QOS values so data transmission to the server runs smoothly

ESTIMASI SIGNAL TO INTERFERENCE RATIO DAN DAERAH CAKUPAN UNTUK SINGLE FREQUENCY NETWORK PADA SIARAN TV DIGITAL (DVB-T)

 Digital TV broadcasting one frequency canal can carry on more than 10 TV station broadcast. In this paper describe how SFN(Single Frequency Network) system work with spread receiver node where determine power level that received node toward a few transmitter. The method that applied power level receiver be compared to incoming interference in receiver called S/I ratio (Signal to Interference Ratio). This estimate method also determine by some standard ETSI DVB-T comparation factor to reach QEF(Quasi Error Free) condition, comparator for transmitter signal good or bad. Determination of the maximum distance between transmitter 8.4 km derived from the specification of DVB-T 8K mode with guard interval 1/32. The results obtained in the test area of 20 Km x 20 Km at QEF 22.8dB covered 39%, QEF factor 19.3dB covered 53% and QEF 16.7 dB covered 82%. SFN design method the range of recipients who reach QEF area increased.Keywords: Digital TV, SFN, QEF, Interference, S/I Ratio Pada siaran TV Digital 1 kanal frekuensi dapat membawa lebih dari 10 siaran stasiun TV. Paper ini membahas bagaimana sistem SFN (Single Frequency Network) bekerja menyebarkan titik penerima menentukan level daya yang diterima satu penerima terhadap beberapa pemancar. Metode yang diterapkan estimasi S/I ratio (Signal to Interference Ratio) yaitu level daya Signal suatu penerima dibandingkan dengan Interference yang masuk pada penerima. Metode estimasi ini ditentukan juga dengan standard DVB-T ETSI yaitu faktor pembanding untuk mencapai kondisi QEF(Quasi Error Free) pembanding untuk sinyal penerima baik atau buruk. Penentuan jarak maksimum antar pemancar 8,4Km didapat dari spesifikasi mode 8K DVB-T dengan guard interval 1/32. Hasil yang didapatkan di area uji 20Km x 20Km pada QEF 22,8dB sebesar 39%, pada QEF 19,3dB tercakup 53% dan QEF 16,7 dB sebesar 82% tercakup. Perancangan dengan metode SFN ini hasil jangkauan area penerima yang mencapai QEF akan meningkat.Kata Kunci: TV Digital, SFN, QEF, Interference, S/I ratio

Filtering Power Divider menggunakan Filter SIW untuk Aplikasi WLAN 5,8 GHz

ABSTRAKDalam makalah ini dikembangkan sebuah pembagi daya yang terintegrasi dengan proses filtering yang dinamakan Filtering Power Divider (FPD) untuk mendapatkan ukuran perangkat yang compact. FPD yang diusulkan terdiri dari 2 buah Band Pass Filter (BPF) yang dirancang berdasarkan teknik Substrate Integrated Waveguide (SIW) untuk beroperasi pada frekuensi Wireless Local Area Network (WLAN) 5,8 GHz. Optimasi dilakukan dengan menggunakan sebuah perangkat lunak simulasi untuk menyelidiki pengaruh parameter filter yang berbeda terhadap proses pemfilteran serta tanggapan keluaran FPD. Substrat dielektrik Duroid 5880 dengan ketebalan 1,575 mm digunakan untuk merealisasi FPD dengan total dimensi 95 mm x 70 mm. FPD yang direalisasi memiliki tanggapan bandwidth sebesar 75 MHz pada rentang frekuensi 5,9 GHz hingga 5,975 GHz dan isolasi antar port keluaran sebesar 20 dB.Kata kunci: Band Pass Filter (BPF), filtering power divider, Substrate Integrated,Waveguide (SIW), Wireless Local Area Network (WLAN).ABSTRACTIn this paper power divider integrated with filtering process, named as Filtering Power Divider (FPD), is developed to achieve a compact size of the device. The proposed FPD is composed of 2 pieces of Band Pass Filter (BPF) designed based on Substrate Integrated Waveguide (SIW) to operate at the Wireless Local Area Network (WLAN) frequency of 5.8 GHz. The optimizations are carried out using a simulation software to investigate the effect of different filter parameters to the filtering process as well as to the output response of FPD. A Duroid 5880 dielectric substrate with the thickness of 1.575 mm is used to realized the FPD with the total dimensions of 95 mm x 70 mm. The realized FPD has a bandwidth response of 75 MHz in the frequency range of 5.9 GHz to 5.975 GHz and isolation between output ports is 20 dB.Keywords: Band Pass Filter (BPF); filtering power divider; Substrate Integrated Waveguide (SIW); Wireless Local Area Network (WLAN)

Compact Structure and Low Losses for Wilkinson Power Divider at 9400MHz Frequency for X-Band Antenna System

This paper is under in-depth investigation due to suspicion of possible plagiarism on a high similarity indexThis paper presents design and implementation 2-way Wilkinson power divider at 9400 MHz frequency which matched to 50Ω transmission line. This design applies Microstrip line with Roger Duroid 5880 Substrate and uses software simulation (ADS 2011) to help the design. This Wilkinson power divider designed at 9400MHz for use on Antenna X-Band Radar System. The desire objective is a power divider can be used in compact circuit board with low insertion loss and good matching for all ports. The dimension of the devices after fabrication is 30mm x 35mm. The voltage standing wave ratio (VSWR) for all port for both dividers is less than 1.33,  Forward transmission the devices as divider or the split power ratio (S21 and S31)is about -2.522dB, reverse transmission the devices as combiner (S12 and S13) is about -2.861dB. The isolation between the both output ports shows a good isolation, less than -11.271dB. The overall result of simulation and fabrication show a fairly good result

Desain dan Realisasi Antena Mikrostrip Patch Persegi Susunan Linier dengan Teknik Pencatuan Proximity Coupled pada Frekuensi 4 ,3 GHz untuk Radio Altimeter Pesawat

Pada penelitian ini telah dilakukan perancangan, simulasi, dan realisasi antena mikrostrip array dengan catuan proximity coupling untuk aplikasi radio altimeter. Penentuan nilai dimensi antena dilakukan dengan menggunakan rumus-rumus antena mikrostrip. Nilai-nilai dimensi yang telah diperoleh kemudian disimulasikan dengan simulator elektromagnetik untuk memperoleh performansi yang dihasilkan. Selain itu, proses simulasi juga digunakan untuk mengoptimasi desain antena. Antena yang dirancang mampu bekerja pada frekuensi 4,3 GHz, dengan return loss< -10 dB, VSWR < 2, bandwidth 100 MHz, gain ≥ 9,25 dBi, pola radiasi unidirectional, dan polarisasi linier. Substrat yang digunakan adalah Rogers RT5880 yang memiliki permitivitas relatif sebesar 2,2 dan ketebalan sebesar 1.57 mm. Antena yang terealisasi bekerja pada frekuensi tengah 4,3 GHz yang menghasilkan VSWR 1,005, polarisasi elips, gain 13,46 dB, pola radiasi unidirectional, impedansi 50,113 - j228,123 mOhm, return loss -51,890 dB, dan effective bandwidth 286 MHz (4,175-4,461 MHz)

Design and Realization of Coupled Line Bandpass Filter Using Compact Structure at Frequencies of 3300 MHz – 3400 MHz for WiMAX Application

In this paper, the design of microstrip BPF (Bandpass Filter) for WiMAX (Worldwide Interoperability for Microwave Access) application has been presented. The frequency band allocations for BWA (Broadband Wireless Access) in Indonesia are 2.3; 3.3 and 5.8 GHz. This microtrip BPF is designed using parallel coupled line in compact form and it has spesific parameter, i.e. 3.35 GHz center frequency, 400 MHz bandwidth, VSWR ≤ 2, -3 dB insertion loss and matching impedance between two port is 50 Ω. The Advanced Design System (ADS) software has been used during simulation and optimization. The simulation results show that return loss S11 and insertion loss S21 are -15.31 dB and -2.2 dB at 3.35 GHz respectively. For the design verification, the prototype of the proposed design wasfabricated and measured.The results of the fabrication approach of simulation results, which have return loss value S11and insertion loss S21 of the proposed microstrip filter are -18.20 dB and -2.91 dB at 3.35 GHz respectively. The result shows that the proposed design can be implemented forWiMAX communication system application

Design and Implementation of IoT-Based Monitoring Battery and Solar Panel Temperature in Hydroponic System

Hydroponics is currently widely used for the effectiveness of farming in narrow areas and increasing the supply of food, especially vegetables. This hydroponic technology grew until it collaborated with the internet of things technology, allowing users to monitor hydroponic conditions such as temperature and humidity in the surrounding environment. This technology requires electronic systems to obtain cost-effective power coverage and have independent charging systems, such as power systems using solar panels, where the power received by solar panels from the sun is stored in batteries. It must ensure that the condition of the battery and solar panels are in good condition. The research contribution is to create a solar panel temperature monitoring system and battery power using Grafana and Android Application. Apart from several studies, solar panels are greatly affected by temperature, which can cause damage to the panels. If the temperature is too high, the battery and panel temperature monitoring system can help monitor the condition of the device at Grafana and Android application with sensor data such as voltage, current, temperature and humidity that have been tested for accuracy. Accuracy test by comparing AM2302 sensor with Thermohygrometer and INA219 sensor with multimeter and clampmeter, both of which have been calibrated. The sensor data gets good accuracy results up to 98% and the Quality-of-Service value on the internet of things network is categorized as both conform to ITU G.1010 QOS data based on network readings on the wireshark application. QOS results are 0% Packet loss with very good category, 14ms delay with very good category and Throughput 71.85 bytes/s. With the results of sensor accuracy and QOS, the system can be relied upon with a high level of sensor accuracy so that environmental conditions are monitored accurately and good QOS values so data transmission to the server runs smoothly