| 1. |
- Landin, Per N., 1983-, et al.
(author)
-
Parameter Extraction and Performance Evaluation Method for Increased Performance in RF Power Amplifier Behavioral Modeling
- 2010
-
In: International Journal of RF and Microwave Computer-Aided Engineering. - : Hindawi Limited. - 1096-4290 .- 1099-047X. ; 20:2, s. 200-208
-
Journal article (peer-reviewed)abstract
- A frequency-weighted parameter extraction method based on the performance evaluation criterion weighted error spectral power ratio (WESPR) is proposed. Performance of models extracted using the normalized mean square error (NMSE) are compared to the performances of models extracted using the WESPR. The results show an increase in performance with a decrease in model complexity.
|
|
| 2. |
- Piazzon, L., et al.
(author)
-
Design Method for Quasi-Optimal Multiband Branch-Line Couplers
- 2014
-
In: International Journal of RF and Microwave Computer-Aided Engineering. - : Hindawi Limited. - 1096-4290 .- 1099-047X. ; 24:1, s. 117-129
-
Journal article (peer-reviewed)abstract
- In this article, the design approach, the implementation, and experimental results of multiband branch-line couplers operating at arbitrary frequencies are presented. The conventional branch-line coupler structure is adapted to multiband operation by shunting its four ports with multiband reactive networks. The performance of the proposed multiband couplers is theoretically analyzed and optimized through the even-odd mode circuit analysis. Dual-band (2.4-3.5 GHz), triple-band (1.5-2.4-4.2 GHz), and quad-band (1.5-2.4-3.5 GHz) microstrip branch-line couplers have been realized and tested to verify the design method. The good experimental results (input return loss greater than 15 dB and amplitude imbalance lower than 0.7 dB) show excellent agreement with theoretical and simulated ones, thus validating the proposed approach.
|
|
| 3. |
- Xiao, Fei, et al.
(author)
-
Quasi-TEM approach of coupled-microstrip lines and its application to the analysis of microstrip filters
- 2012
-
In: International Journal of RF and Microwave Computer-Aided Engineering. - : Hindawi Limited. - 1096-4290 .- 1099-047X. ; 22:1, s. 131-139
-
Journal article (peer-reviewed)abstract
- In this article, the quasi-TEM approach is successfully used to analyze coupled-microstrip lines of finite length, which are usually used for the coupling between the source/load and resonators in microstrip filters. First, an orthogonal expansion method is used to extract the per-length inductance and capacitance matrices. The authors then obtain the impedance matrix or admittance matrix, which relates the voltages and currents at both ends of coupled-microstrip lines. To verify our theory, an example is presented, i.e., a Y-shaped dual-mode bandpass microstrip filter, for which, the equivalent circuit model based on the quasi-TEM analysis of coupled-microstrip lines is accurately set up. The approach in this article is applicable to planar microstrip lines with arbitrary number of conductors, under the quasi-TEM assumption.
|
|
