Solution Manual for Microwave Circuit Design A Practical Approach Using ADS, 1st Edition

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Note:When Figures in the text are cited, it is denoted byFigureand figures in this End-ofchapter solutions are denoted by Figure.CHAPTER 1 PROBLEMS1.1Waveguide generally has lower line loss than microstrip. SIW(Substrate Integrated Waveguide)can be regarded as the planar version of waveguide. How SIW is configured using substrate?SolutionA post-wall waveguide (also known as substrate integrated waveguide (SIW) or a laminatedwaveguide) is a synthetic rectangular electromagnetic waveguide formed in a dielectric substrate bydensely arraying metallized posts or via-holes which connect the upper and lower metal plates ofthe substrate. The waveguide can be easily fabricated with low-cost and mass-production usingthrough-hole techniques where the post walls consists of via fences. The post-wall waveguide isknown to have similar guided wave and mode characteristics to the conventional rectangularwaveguide with equivalent guided wavelength. The structure is shown below. Since SIW provideslow loss, filters using SIW have studied by many researchers.Figure 1.1The structure of SIW1.2Find the microwave integrated circuit example built using LTCC in the web-site.SolutionIn the web site http://www. barryltcc.com/, there is a TR (Transmit and Receive) module for radar.1.3How the ALC inFigure1.7 is constructed?SolutionFigure 1.2 shows a block diagram for ALC. Usually PA module has the terminal for output powercontrol. If not, a driver amplifier should be designed to control the output power level. A smallportion of output power is sampled through a directional coupler as shown in Fig. 1.2 and the RFpower level is detected through a diode detector. The reference signal is a variable DC voltage

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