A compact lowpass filter for satellite communication systems based on transfer function analysis

Lalbakhsh, Ali; Jamshidi, Mohammad; Siahkamari, Hesam; Ghaderi, Amirhossein; Golestanifar, Alireza; Linhart, R.; Talla, Jakub; Simorangkir, Roy B. V. B.; Mandal, Kaushik

doi:10.1016/j.aeue.2020.153318

Cited by 50 publications

(19 citation statements)

References 47 publications

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“…Figure 2 shows the distribution of the transmission poles and transmission zeros in the frequency range [0, f 0 ]. The numbers and relative positions of the transmission zeros and transmission poles are shown in Equation (6).…”

Section: Transmission Zero Analysismentioning

confidence: 99%

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Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator

Guan

Chen

et al. 2020

Electronics

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In this paper, a wideband bandpass filter with a coupled line cross-shaped resonator (CLCSR) is proposed. The proposed bandpass filter is composed of two open-end parallel coupled lines, one short-end parallel coupled line, one branch microstrip line, and the parallel coupled line feed structure. With the use of the even and odd mode approach, the transmission zeros and transmission poles of the proposed bandpass filter are analyzed. The coupling coefficient of the parallel coupled line feed structure is big, so the distance between the parallel coupled line is too small to be processed. A three microstirp lines coupled structure is used to realize strong coupling and cross coupling. This structure also can reduce the return loss in passband and increase the out-of-band rejection. The transmission zeros can be adjusted easily by varying the lengths of the open-end parallel coupled line or the short-end parallel coupled line. The proposed bandpass filter is fabricated and measured. The simulated results agree well with the measured ones, which shows that the design method is valid.

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Section: Transmission Zero Analysismentioning

confidence: 99%

“…A compact lowpass filter for satellite communication systems is proposed in Ref. [6]. The LC equivalent circuit is used for the lowpass filter design.…”

Section: Introductionmentioning

confidence: 99%

Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator

Guan

Chen

et al. 2020

Electronics

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“…Recently, various types of filters have been studied and many tunable RF filters have been proposed. Microstrip filters have shown flexibility in integrating with other active components and planar circuits 6‐9 . A screw tunable cavity filter with sharp selectivity and good return loss is proposed in, 10 but its lower tunability range and large 3D size limit its application in planar and compact systems.…”

Section: Introductionmentioning

confidence: 99%

Highly‐tunable and wide stopband microstrip bandpass filters

Iqbal

Smida

Waly

et al. 2021

Int J RF Microw Comput Aided Eng

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This paper presents the design of a highly‐tunable single‐ended and balanced filter with improved upper stopband performance. The proposed filters are designed using a spurline and a U‐shaped stepped impedance resonator (SIR) with a varactor diode connected to the open‐circuited end. A spurline is introduced in both designs to achieve wide stopband performance by suppressing the higher‐order modes. The proposed filters have high tunable ranges (single‐ended: 2.35‐3.99 GHz; balanced: 2.39‐4 GHz), low insertion losses (IL) (single‐ended: 0.07‐0.2 dB; balanced: 0.21 to 1.1 dB) and wide upper stopband performance (single‐ended: 3.79f1 with a rejection level higher than 20 dB; balanced: 3.79f1 with a rejection level higher than 20 dB). Performance of both filters are experimentally validated by comparing the experimental results with the simulated ones. Both filters can cover most of the fifth‐generation (5G) wireless communication bands with different biasing voltages (capacitance). When both filters are compared with state‐of‐the‐art filters, the proposed filters are found to achieve high tunable ranges with low IL and wide upper stopband performance.

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“…Artificial intelligence is an excellent solution to ease the design procedure and modeling in several engineering problems [11][12][13][14][15]. Also, ANNs have been used to model the power amplifiers [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Using an ANN Approach to Estimate Output Power and PAE of A Modified Class-F Power Amplifier

Jamshidi

Roshani

Talla

et al. 2020

2020 International Conference on Applied Electronics (AE)

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In this paper, an efficient Class-F power amplifier (PA) is designed, simulated and modeled. This type of amplifier has nonlinear behaviors and uses tuning and controlling harmonics as the most important mechanism to increase efficiency. Feedforward artificial neural network (ANN) model is proposed to predict and estimate the nonlinear output of the power amplifier. The designed amplifier operates at 900 MHz, with 18 dB gain and 70 %Power-Added Efficiency (PAE). In the design process, the artificial neural network model is used to predict PAE and output power parameters as a function of input power, drain voltage and gate voltage of the applied transistor (DC Biasing voltages). The obtained mean relative errors (MREs) are less than 0.03% and 0.09% for the predicted output power and PAE parameters.

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A compact lowpass filter for satellite communication systems based on transfer function analysis

Cited by 50 publications

References 47 publications

Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator

Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator

Highly‐tunable and wide stopband microstrip bandpass filters

Using an ANN Approach to Estimate Output Power and PAE of A Modified Class-F Power Amplifier

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