| TOPIC: Microwave Integrated Circuits |
| Manuscript Title: Design of a Miniaturized Front-End Passive Integrated Module for WLAN Using LTCC |
| Manuscript Id: IJMOT-2006-5-48 |
| Abstract: In this paper a highly integrated miniaturized passive integrated module for combo WLAN was designed. The module was composed of several RF passive components integrated on a low temperature cofired ceramic (LTCC). By using the benefit of the multi-layer environment, these components can be embedded in a module size of with excellent performance of low insertion loss, and also satisfied the required spurious rejections and harmonic suppression simultaneously. The design will use the characteristics of the individual components to reduce the component amount and improve the electrical performance. |
| Authors: Young-Huang Chou,Li-Ju Chen, Ping-Hsiao Liao and Hao-Hui Chen |
Category: MicrowaveTechnology Submitted On: 8/13/2006 Full Text [PDF] Pg.Nos: 384-388
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| Manuscript Title: Virtual Port Parameters in Segmentation Method for Modeling Power Bus Structures in Multilayer PCBs |
| Manuscript Id: IJMOT-2006-6-100 |
| Abstract: Power bus noise problem has become a major concern for both EMC engineers and board designers. A fast algorithm derived from the cavity-mode model, is applied together with the segmentation method for estimating the impedance of power bus structures in multilayer printed circuit boards. In the segmentation method, the parameters of the virtual ports used for the interconnection between the segments can significantly influence the accuracy. We have demonstrated that, as a criterion, setting 15 virtual ports has been enough to give accurate results, for an interconnecting section with a length of one wavelength in the dielectric at the highest frequency being considered. However, when the length of the interconnecting portion is very short, beyond this criterion, setting at least 5 virtual ports is necessary. |
| Authors: Z. L. Wang, O. Wada, Y. Toyota, R. Koga |
Category: MicrowaveTechnology Submitted On: 6/13/2006 Full Text [PDF] Pg.Nos: 389-393
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| Manuscript Title: Ka-band Coplanar Class-F MMIC Power Amplifier in a GaAs pHEMT Technology |
| Manuscript Id: IJMOT-2006-6-102 |
| Abstract: Design and measured results of a monolithic integrated low-voltage highly-efficient power amplifier (PA) are reported. The load network is designed to perform harmonic tuning and load impedance transformation with a minimum number of elements. As a result, the coplanar class-F amplifier delivers 19.5 dBm of RF power with a power added efficiency (PAE) of 43.4% from a 2.4 V supply at 23.25 GHz. Measured results show
greater than 36% of PAE and more than 18.5 dBm of output power from 21.5 GHz to 24.2 GHz. |
| Authors: Renato Negra, Werner Bächtold |
Category: MicrowaveTechnology Submitted On: 8/2/2006 Full Text [PDF] Pg.Nos: 394-399
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| Manuscript Title: Suppression of Parallel-Plate Waveguide Noises Excited from Signal Vias in Multilayer Boards Using Virtual Islands |
| Manuscript Id: IJMOT-2006-6-115 |
| Abstract: The mitigation method of parallel-plate waveguide noises excited from signal vias due to the mode conversion of desired propagation modes into parasitic PPW modes in multilayer PCBs has been proposed. The mitigation of PPW noises has been achieved using the virtual islands with shorting vias. The shorting vias are used to provide the return current path with low impedances and the virtual islands are used to block the propagation of the PPW noises through PCBs. The PPW noises propagating through PPWs are dramatically suppressed and the electrical performances of signal vias in multilayer PCBs are improved using the proposed method. The performances of signal vias applied the virtual islands with shorting vias can be improved up to higher frequency by reducing the size of virtual islands. |
| Authors: Seungki Nam, Yonghoon Kim, Sub Hur, Hodeok Jang, and Jichai Jeong |
Category: MicrowaveTechnology Submitted On: 8/6/2006 Full Text [PDF] Pg.Nos: 400-405
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| Manuscript Title: A HIGH LINEARITY INGAP/GAAS HBT MMIC UPCONVERSION DOUBLE BALANCED MIXER WITH AN ACTIVE BALUN FOR AFICS |
| Manuscript Id: IJMOT-2006-6-128 |
| Abstract: This paper describes the MMIC double balanced mixer (DBM) which is designed for the adaptive feedback interference cancellation system (AFICS). It is optimized for the dual-band operation for PCS and IMT-2000 applications. By using an integrated active balun at the RF port, it provides single RF output signals. To improve the linearity of the mixer, the resistors for the degeneration and the current injection of transconductance stage are used. The results improved by using them are shown in Table 1. The mixer shows a conversion gain of 0.85 dB, a third-order intermodulation distortion (IMD3) of 80.19 dBc, a third-order input intercept point (IIP3) of 10.0 dBm, a third-order output intercept point (OIP3) of 10.9 dBm, and a 1-dB compression point (P1dB) of -1.5 dBm. |
| Authors: Rok-Hee Lee, Jae-Young Lee, Jeiyoung Lee, Bhanu Shrestha, Nam-Young Kim |
Category: MicrowaveTechnology Submitted On: 6/15/2006 Full Text [PDF] Pg.Nos: 406-410
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