Tài liệu Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P9) doc

... described in Section 10.1 is chosen as an initial design. The attenuation poles at the normalized lowpass frequencies are also chosen as ⍀ = ±1.5 to meet the selectivity. The initial values for ... Schematic circuit for the edge-coupled microstrip bandpass filter for CAD. L4 = sin –1 ΂ Ί ๶ ๶ ๶ ΃ (9.39) where ␭ g and Z r are the microstrip guided wavelength and the microstrip character-...

Ngày tải lên: 15/12/2013, 06:15

... external quality factors of mi- crowave coupling structures from EM simulations. 235 Microstrip Filters for RF/ Microwave Applications. Jia-Sheng Hong, M. J. Lancaster Copyright © 2001 John Wiley ... effect if their signs are opposite. Obviously, the direct evaluation of the cou- pling coefficient from (8.31) requires knowledge of the field distributions and performance of the space integr...

Ngày tải lên: 15/12/2013, 06:15

... 10 Advanced RF/ Microwave Filters There have been increasing demands for advanced RF/ microwave filters other than conventional Chebyshev filters in order to meet stringent requirements from RF/ mi- crowave ... Characteristics The filter having only one pair of transmission zeros (or attenuation poles) at finite frequencies gives much improved skirt selectivity, making it a viable intermed...

Ngày tải lên: 15/12/2013, 06:15

... illustrates, where the top and bottom of the cavity are the perfect electric walls and the remaining sides are the perfect magnetic walls. The EM fields inside the cavity can be expanded in terms of TM z mn0 modes: E z = ... filter configuration. 11.5.1 Microstrip Dual-Mode Resonators For our discussion, let us consider a microstrip square patch resonator represented by a Wheeler’s cavity...

Ngày tải lên: 15/12/2013, 06:15

... APPLICATIONS HTS Microstrip Bandpass Filter Non-HTS Microstrip Circuit LNA FIGURE 12.2 RF module with dual-sided six channels of HTS microstrip filters and LNAs. HTS Microstrip Duplexer Non-HTS Microstrip Circuit FIGURE ... APPLICATIONS Microstrip bandstop filter Microstrip hybrid K-connector FIGURE 12.10 Fabricated HTS microstrip duplexer in a test housing. 12.2 HTS MICR...

Ngày tải lên: 15/12/2013, 06:15

... spectrum is the visible optical spectrum, the ultraviolet spectrum, and x-rays. Below the microwave frequency spectrum is the radio frequency (RF) spectrum. The frequency boundary between RF and mi- crowaves ... factors of filter elements on filter performance are also discussed. Chapter 4 summarizes basic concepts and design equations for microstrip lines, coupled microstrip lines, an...

Ngày tải lên: 24/10/2013, 16:15

... building elements in many areas of RF/ microwave en- gineering. Such networks are used to select/reject or separate/combine signals at different frequencies in a host of RF/ microwave systems and equipment. ... chapter to describe various network concepts and provide equations that are useful for the analysis of filter networks. 2.1 NETWORK VARIABLES Most RF/ microwave filters and filter...

Ngày tải lên: 24/10/2013, 16:15

... ␧ 2 F n 2 (⍀) 29 Microstrip Filters for RF/ Microwave Applications. Jia-Sheng Hong, M. J. Lancaster Copyright © 2001 John Wiley & Sons, Inc. ISBNs: 0-471-38877-7 (Hardback); 0-471-22161-9 (Electronic) viously ... describes basic concepts and theories that form the foundation for de- sign of general RF/ microwave filters, including microstrip filters. The topics will cover filter tr...

Ngày tải lên: 28/10/2013, 23:15

... here for easy reference. 4.1 MICROSTRIP LINES 4.1.1 Microstrip Structure The general structure of a microstrip is illustrated in Figure 4.1. A conducting strip (microstrip line) with a width ... section, some typical microstrip discontinuities and components that are of- ten encountered in microstrip filter designs are described. 4.3.1 Microstrip Discontinuities Microstrip dis...

Ngày tải lên: 28/10/2013, 23:15

... Y n denotes the sin- gle microstrip characteristic impedance of the input/output resonator. This type of microstrip bandpass filter is compact, but requires use of grounding microstrip resonators, ... the microstrip is not a pure TEM transmission line. For demonstration, we also let the microstrip resonators be ␭ g0 /4 long and require no capacitive loading for this filter design....

Ngày tải lên: 07/11/2013, 21:15