Microwave Ring Circuits and Related Structures phần 3 docx

... switchable microstrip ring resonator circuits, ” IEEE Trans. Microwave Theory Tech., MTT -36 , pp. 1 733 –1 739 , December 1988. [29] C. Ho, L. Fan, and K. Chang, “Slotline annular ring elements and their applica- tions ... ª Port1 C f C g C r L r C g C f Port2 Port1 C g C r L r C g Port2 Figure 3. 26 Two-port ring circuit (a) configuration and (b) equivalent circuit. UNIPLAN...

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... 32 6 12 Ring Mixers, Oscillators, and Other Applications 33 0 12.1 Introduction 33 0 12.2 Rat-Race Balanced Mixers 33 0 12 .3 Slotline Ring Quasi-Optical Mixers 33 3 12.4 Ring Oscillators 33 4 12.5 Microwave ... Dual-Frequency Ring Antennas 30 7 11.4 Slotline Ring Antennas 30 8 11.5 Active Antennas Using Ring Circuits 31 4 11.6 Frequency-Selective Surfaces 31 9 11...

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... 1.9 63 1.964 1.977 1.9 83 (GHz) Measured Insertion Loss 32 .66 31 .33 32 .3 33. 12 L meas (dB) Measured 3- dB Bandwidth 19 19.5 19 19.5 BW 3dB,means (MHz) Measured Loaded Q 1 03. 32 100.72 104.05 101.69 Measured ... 1.974 1.968 2. 03 2. 03 (GHz) Measured Insertion Loss L meas 35 . 83 35.48 35 .48 33 .4 (dB) Measured 3- dB Bandwidth 20.5 21 20.5 21 BW 3dB,mens (MHz) Measured Load...

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... 11dB at 3. 13GHz. In order to reduce the insertion loss, a 3 ¥ 3 ¥ 0 .3- mm capacitive overlay [9] placed over the input and output of the slotline ring was used to increase the coupling and reduce ... resonator. The ring resonator, shown in Figure 6.1 is 139 Microwave Ring Circuits and Related Structures, Second Edition, by Kai Chang and Lung-Hwa Hsieh ISBN 0-471-4...

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... fractional 3- dB bandwidth of 15.5%. The insertion and return losses are 0. 53 dB and 25.7 dB at 2 .3 GHz, respectively. Two attenuation poles are at 1. 83 and 2.59 GHz with attenuation level of 35 .2 and 31 .3 ... within 3. 43 4 .3 GHz and 7.57–8.47 GHz, and an attenuation rate for the sharp cutoff frequency responses of 137 .58dB/GHz (calculated from 4.1 73 GHz with -3...

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... 2–4-GHz bandwidth. The isolation between ports 1 and 4 is more than 17dB over the same octave bandwidth. At 3 GHz, the coupling of the power from port 1 to the balanced arms 2 and 3 is 3. 4 dB and 3. 7 ... con- figuration of the microstrip rat-race hybrid -ring coupler.To analyze the hybrid- 197 Microwave Ring Circuits and Related Structures, Second Edition, by Kai Chan...

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... configuration and (b) equivalent circuit [34 ]. (Permission from IEEE.) 24 21 18 15 12 9 6 3 0 23 10 2.5 3. 5 4 0 -20 -30 50 40 30 20 -10 Return Loss and Isolation(dB) Coupling(dB) Frequency (GHz) S 11 S 31 S 21 S 41 FIGURE ... attenua- tor,” Microwave J., Vol. 38 , No. 9, pp. 120– 130 , September 1995. [33 ] L. Fan and K. Chang, “Uniplanar power dividers using coupled CPW...

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... 15.098 0 .32 0 198.200 1,190.9 n = 3 16.564 16. 530 0.210 222.100 2, 038 n = 4 18 .34 8 18 .33 3 0.080 194.600 3, 570.6 n = 5 20 .38 6 20 .39 5 0.040 1 83. 300 3, 8 23. 4 n = 6 22.5 93 22.615 0.090 1 63. 600 3, 157.2 n ... a 271 Microwave Ring Circuits and Related Structures, Second Edition, by Kai Chang and Lung-Hwa Hsieh ISBN 0-471-44474-X Copyright © 2004 John Wiley &am...

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... FREQUENCY-SELECTIVE SURFACES 0 5 10 15 20 25 30 35 40 45 50 55 30 .75 31 31 .25 31 .5 31 .75 32 32 .25 32 .5 32 .75 Frequency (GHz) Aperture efficiency (%) FIGURE 11 .31 Measured aperture efficiency [48]. (Permission ... (Permission from IEEE.) CHAPTER TWELVE Ring Mixers, Oscillators, and Other Applications 33 0 Microwave Ring Circuits and Related Structures, Second...

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... uniplanar ring resonators, 85–90 Local oscillator (LO) pump: microwave optoelectronics applications, 34 4 34 6 single-balanced ring mixer, 33 1 33 3 slotline ring quasi-optical mixers, 33 3 33 4 Local ... dual-frequency configurations, 30 7 30 8 slotline structures, 30 8 31 4 Ring bandpass filters, two transmission zeros, 179–186 Ring bandstop filters, applications, 161–164 Ri...

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