An Analytical Design of a Complex Coefficient Transfer Function with Flat Passband Characteristics and Finite Transmission Zeros at Two Frequencies

2020 ◽  
Vol 140 (5) ◽  
pp. 496-501
Author(s):  
Tatsuya Fujii ◽  
Kazuhiro Shouno
Keyword(s):  
Transfer Function ◽  
Complex Coefficient ◽  
Analytical Design ◽  
Transmission Zeros

Design of a Direct Sampling Mixer with a Complex Coefficient Transfer Function

2012 ◽  
Vol E95.C (6) ◽  
pp. 999-1007 ◽  
Author(s):  
Yohei MORISHITA ◽  
Noriaki SAITO ◽  
Koji TAKINAMI ◽  
Kiyomichi ARAKI
Keyword(s):  
Transfer Function ◽  
Complex Coefficient ◽  
Direct Sampling

scholarly journals Positive Real Zeros in Flexible Beams

1995 ◽  
Vol 2 (6) ◽  
pp. 429-435 ◽  
Author(s):  
Eric H. Maslen
Keyword(s):  
Transfer Function ◽  
Dynamic Properties ◽  
Flexible Structures ◽  
Physical Significance ◽  
Control Problems ◽  
Sensor Location ◽  
Positive Real ◽  
Flexible Beams ◽  
Real Zeros ◽  
Transmission Zeros

Feedback control of flexible structures naturally involves actuators and sensors that often cannot be placed at the same point in the structure. It has been widely recognized that this noncollocation can lead to difficult control problems and, in particular, difficulty in achieving high robustness to variation in the dynamic properties of the structure. This problem has previously been traced to transmission zeros in the dynamic transfer function between sensor location and actuator location, especially those lying on the positive real axis in the complex plane. In this artie/e, the physical significance of these zeros is explored and the dynamic properties of beams that give rise to real positive zeros are contrasted to those of torsional and compressive systems that do not.

scholarly journals Half-Elliptical Resonator Lowpass Filter with a Wide Stopband for Low Band 5G Communication Systems

Electronics ◽  
2021 ◽  
Vol 10 (23) ◽  
pp. 2916
Author(s):  
Rasoul Azadi ◽  
Saeed Roshani ◽  
Arez Nosratpour ◽  
Ali Lalbakhsh ◽  
Mohammad Hazhir Mozaffari
Keyword(s):  
Transfer Function ◽  
Loss Tangent ◽  
Communication Systems ◽  
Figure Of Merit ◽  
State Of The Art ◽  
The State ◽  
Lowpass Filter ◽  
Transmission Zero ◽  
Transmission Zeros ◽  
Good Agreement

In this paper, a lowpass filter is designed using half elliptical resonators with a wide stopband. New formulas are presented to achieve a circuit model for the half elliptical resonators used in this work. Additionally, the transfer function and transmission zero equations are used to adjust the frequency of the transmission zeros of the filter. The cut-off frequency of the lowpass filter is 1.26 GHz with a sufficiently large stopband, extending from 1.48 GHz to 20 GHz. The proposed filter’s figure of merit is 62,520, demonstrating its outperformance compared to the state of the art. The filter is implemented on a RT-5880 substrate with a constant dielectric of 2.2, thickness of 31 mil and loss tangent of 0.0009. The LPF was fabricated and tested, showing good agreement between the simulated and measured results.

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