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    Galileo-E5a Bandwidth Frequency Filter Design for Galileo-E5a Receiver
    (2022-09-01)
    Mekpradab, Teerachet
    ;
    Onanong, Narumol
    ;
    Chinnapark, Surachet
    ;
    Pattameak, Julongkorn
    ;
    Kenpankho, Prasert
    This study focused on the design of the band-reject filter on the frequency of the Galileo satellite by providing bandwidth at the cut-off frequency equal to the bandwidth of the Galileo-E5a. The selecting of response characteristic is Butterworth's maximally flat, amplitude-frequency response of the band-reject filter. This poster shows the combination of the LPF and HPF to perform a band-reject filter. Therefore, there are two combinations also in designing for the band-reject filter. This combination aims to influence the performance of the band-reject filter. Band rejects filter design using the frequency of the Galileo-E5a with bandwidth is 25 MHz.using a Butterworth filter which is presented in this poster. The circuit is composed 3rd.order.Moreover, the combination between LPF and HPF is designed to act as a band-reject filter. As a result, we can filter the frequency of Galileo-E5a by using the band-reject filter.
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    QZSS L5 Bandwidth Frequency Filter Design for QZSS Receiver
    (2022-03-01)
    Pattameak, Julongkorn
    ;
    Onanong, Narumon
    ;
    Makpradab, Teerachet
    ;
    Chinnapark, Surachet
    ;
    Kenpankho, Prasert
    The purpose of this study was to design QZSS L5 Bandwidth Frequency Filter for QZSS Receiver. We presented the configuration of the Butterworth bandpass filter by using PSpice as the tool for the simulation. Bandpass filter frequency of the QZSS L5 with bandwidth is designed in 25 MHz using the Butterworth filter which is presented in this article. These designed circuits are composed of the 3rd order. Moreover, the combination between low pass filter and high pass filter is performed as a bandpass filter. In conclusion, this designed filter on the frequency of QZSS L5 is to be useful by using the Butterworth bandpass filter.
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    Resistorless Transconductance-mode Multifunction Filter with Orthogonal and Electronic Tune of Natural Frequency and Quality Factor
    (2022-01-01)
    Chinnapark, Surachet
    ;
    Siripongdee, Surapong
    ;
    Jaikla, Winai
    ;
    Thanaputtiwirot, Somsak
    ;
    Sotner, Roman
    This work provides the synthesis of multifunction biquad active filter which has three input voltage nodes and single output current node. The synthesis procedure which is based on the RLC parallel circuit is given step by step. An analog active building block employed in this synthesis is the modified current controlled current conveyor transconductance amplifier (M-CCCCTA). The proposed filtering structure consists of two M-CCCCTAs and two grounded capacitors without any passive resistors. All input voltage nodes and output current node are high impedance which is cascadable without the need of any buffer devices. Five second order filtering types are obtained in the network. The filtering parameters including the natural frequency (?0), quality factor (Q) and pass band gain are electronically controlled. In addition, the Q is also electronically controlled without disturbing the ?0. The PSpice simulations using the model process parameters of the NR100N (NPN) and PR100N (PNP) bipolar transistor arrays ALA400CBIC-R from ATT are given to investigate the characteristics of the proposed active filter.
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    Galileo-E6 Bandwidth Frequency Filter Design for Galileo Receiver
    (2021-09-01)
    Chinnapark, Surachet
    ;
    Onanong, Narumol
    ;
    Pattameak, Julongkorn
    ;
    Mekpradab, Teerachet
    ;
    Kenpankho, Prasert
    This research discusses about the combination of the LPF and HPF to perform band reject filter. Therefore, there are two combination also in designing band reject filter. The aim of this combination to get know is there have an influence on the performance of band reject filter was designed by using the frequency of the GalileoE6 with bandwidth 40 MHz. This filter is used a Butterworth filter which is presented in this study. These filter circuit is composed 4rd order. In addition to, the combination between LPF and HPF forming to a band reject filter is designed. As a result, the filter design on the frequency of Galileo-E6 is successfully used in band reject filter.
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    QZSS L1 Bandwidth Frequency Filter Design for QZSS Receiver
    (2021-03-01)
    Onanong, Narumol
    ;
    Pattameak, Julongkorn
    ;
    Mekpradab, Teerachet
    ;
    Chinnapark, Surachet
    ;
    Kenpankho, Prasert
    We present the design of bandpass filter on the frequency of the QZSS satellite, by providing bandwidth at the cut-off frequency equally to the bandwidth of the QZSS L1 with selecting the response characteristic on Butterworth maximally flat amplitude. Bandpass filter design using frequency of the QZSS L1 with bandwidth is 24MHz. The design procedure involves two steps, the first step is to find the required order of the filter, which we use 3rd order, and the second step is to find the scale factor that must be applied to the normalized parameter values. The Band-Pass Butterworth filler is a combination between low pass and high pass. For the Butterworth filter, the value of a resistor that has been used are 50Ω. Then go to find the capacitor and inductor and by using PSpice as the tools for the simulation. The results of the output of bandpass filter at-3dB was between 1563 and 1587MHz. And was bandwidth around 24MHz. The combination of the lowpass filter and high pass filter is to perform as the bandpass filter. Therefore, there are two combinations also in designing bandpass filter. The aim of this combination is to have an influence on the performance of bandpass filter. As a conclusion, this designed filter on the frequency of QZSS L1.