http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Modification of Data transmission Filter with Generalized Bessel Transformation
Virote Pirajnanchai,Vanvisa Chutchavong,Kanok Janchitrapongvej 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
This paper present modification of data transmission filter by the application of Generalized Bessel transformations with rational filter. The technique gives the denominator of filter transfer function in analytic closed form, while its numerator is determined by solving a set of transmission zeros and even polynomial of order. The results to filter is straightforward and will be given in a later more detailed contribution together with comparison with the other existing design methods, such a comparison reveals the superiority of the present technique.
Active Notch Uniformly Distributed RC Circuit and Their Application
Nipont Tangthong,Virote Pirajnanchai,Kanok Janchitrapongvej 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Many application of the RC parallel-T network, only two performance characteristics are considered important the frequency and depth of the attenuation notch. In this paper the design presented, active notch distributed RC network (U RC) circuit from design values. The proposed circuit configuration consists of U RC , one external resistor (Rn) or capacitor (Cn) and single gain amplifier. The parameters of the proposed circuit can be adjusted to improve the magnitude response with notch tunable frequency. This structure reduces an amount of circuit complexity and is simple to use for application. The experiments and computer simulation showed good agreement with theoretical values. The active notch U RC can application to experiments high frequency active band-pass filter, sinusoidal wave oscillator and frequency discriminator
Uniformly Distributed RC Waveform Function Generator
Nipont Tangthong,Virote Pirajnanchai,Kanok Janchitrapongvej 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper describes a new waveform function generator implemented by uniformly distributed RC (URC). Waveform generating URC are used to generate the sine, square and triangular waveforms with a low-cost function generator. Experimental results confirming the validity of the waveform and. Frequency.
Multiband Microstrip-Fed Right Angle Slot Antenna Design for Wireless Communication Systems
Paitoon Rakluea,Noppin Anantrasirichai,Kanok Janchitrapongvej,Toshio Wakabayashi 한국전자통신연구원 2009 ETRI Journal Vol.31 No.3
This paper presents a novel multiband microstrip-fed right angle slot antenna design technique for multiple independent frequency bands. The new technique uses various slot sizes at various appropriate positions. We first propose a tri-band slot antenna consisting of three right angle slots. Then, a quad-band slot antenna is developed with four right angle slots which achieves slant ±45° linear polarization, omnidirectional pattern coverage, good antenna gain, and acceptable impedance bandwidths over all the operating frequency range. Moreover, an opencircuited tuning stub is introduced to achieve good impedance matching. Both proposed antennas are designed on a ground plane of RT/duroid 5880 substrate with a thickness of 1.575 mm. The real measurable results show that the desired frequencies used in wireless communication systems, namely, WLAN and WiMax, are efficiently achieved.