By Topic

Art of Miniaturizing RF and Microwave Passive Components, 2008. IMWS 2008. IEEE MTT-S International Microwave Workshop Series on

Date 14-15 Dec. 2008

Filter Results

Displaying Results 1 - 25 of 70
  • 2008 IEEE MTT-S International Microwave Workshop Series (IMWS) on Art of Miniaturizing RF and Microwave Passive Components Proceeding

    Page(s): 1
    Save to Project icon | Request Permissions | PDF file iconPDF (228 KB)  
    Freely Available from IEEE
  • [Copyright notice]

    Page(s): 1
    Save to Project icon | Request Permissions | PDF file iconPDF (322 KB)  
    Freely Available from IEEE
  • Message from the General Chairs

    Page(s): (1)
    Save to Project icon | Request Permissions | PDF file iconPDF (92 KB)  
    Freely Available from IEEE
  • Committee Officers

    Page(s): (2) - (3)
    Save to Project icon | Request Permissions | PDF file iconPDF (75 KB)  
    Freely Available from IEEE
  • Advanced Program

    Page(s): (4) - (9)
    Save to Project icon | Request Permissions | PDF file iconPDF (2394 KB)  
    Freely Available from IEEE
  • Table of contents

    Page(s): 1
    Save to Project icon | Request Permissions | PDF file iconPDF (100 KB)  
    Freely Available from IEEE
  • Recent Progress in Miniature Microwave Filters

    Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2457 KB) |  | HTML iconHTML  

    This paper aims to review some miniature microwave filters developed recently, including dual-mode microstrip open-loop resonator filters, folded waveguide resonator filters, multilayer filters and superconducting filters. The concepts and techniques explored to achieve the miniaturization are described with some demonstrators. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Miniaturization of BPF Based on Broad-Side Coupled Strip Resonators

    Page(s): 7 - 12
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1976 KB) |  | HTML iconHTML  

    Three types of resonators and filters are described that belong to the family of broad-side coupled metal strip structure. Strong coupling between strips due to large mutual capacitance naturally increases the intensity of stored electric energy, resulting in a high effective permittivity for artificial dielectrics and a low resonant frequency for multi-strip resonators. Both features are useful for miniaturization of the resonators made of those principles. Improvement of loss and/or spurious characteristics is attained by a proper choice of metal strip dimension, orientation and intensity. Broad-side coupling is also used for wide range of control of coupling coefficient. By insertion of metal shield between two resonators, the coupling coefficient is controlled from 0.001 to 1.0 (1000 times) without changing the resonator distance. This feature is another means to miniaturize BPFs. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Recent Advances in Microwave Filters

    Page(s): 13 - 14
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1144 KB) |  | HTML iconHTML  

    This paper will describe recent advances in techniques for the design and realisation of microwave filters for a variety of applications including mobile and satellite communications, and radar. The first area, lossy filters, is that of the synthesis of filters with finite dissipation loss. This enables the realisation of highly selective filters with lower resonator Q factor than conventional design approaches, consequently reducing the physical size of filters in receiver applications. The second approach, frequency selective limiters, is a non-linear filtering technique which reduces the dynamic range of signals across a wide frequency band, enabling simpler A-D conversion of radar signals. The third technique, reconfigurable filters, is a new method for constructing tunable bandpass filters with low loss and high intercept point. Finally we will present results on techniques for the design of multi-mode patch antennas with filtering characteristics, enabling wider band and multiband operation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Advanced Design and Manufacturing of Microwave Components Based on Shape Optimization and Ceramic Stereolithography Process

    Page(s): 15 - 18
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1512 KB) |  | HTML iconHTML  

    A design technique based on a shape optimization strategy (topology gradient algorithm) and a 3D ceramic stereolithography process are described in this paper. Our goals are to propose innovative components in terms of electric performances and topologies, by using these two approaches together. Several components have been designed, manufactured and tested with success. An example is given for the design of microwave filters including dielectric resonators. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Miniaturization Design for Planar Hybrid Ring Couplers

    Page(s): 19 - 22
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1464 KB) |  | HTML iconHTML  

    Miniaturization of a microstrip rat race coupler is implemented by three approaches. First, a new rat race hybrid design is devised for circuit miniaturization based on the periodic stepped-impedance ring structure. The circuit has a normalized area of 21.5%. In the second approach, miniaturization is carried out by incorporating a broadside-coupled structure and stepped-impedance sections into the design. The former is used to replace the 3lambda/4-section and the latter is to substitute each lambda/4-section in the regular 6lambda/4 circuits. As a result, one of the circuits occupies only 18% of the area of a traditional rat race. Finally, a general synthesis is performed to design reduced-length rat race rings. Incorporating the stepped-impedance configuration, the normalized circuit area is 13.12% of a 6lambda/4-ring. All the designs are validated by comparing measured four-port parameters with the simulated results. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of Minimized Electromagnetic Bandgap Structure High Temperature Superconducting Filter

    Page(s): 23 - 25
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1313 KB) |  | HTML iconHTML  

    A novel electromagnetic bandgap (EBG) of periodic rings etched on a YBCO microstrip line is presented and a minimized bandstop filter of high performance is obtained. In addition, this paper also develops a miniature EBG high temperature superconductors (HTS) disk filter with high power handling capability by etching five circular holes from a disc resonator. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Integrated Combined Amplifiers for Planar Circuits

    Page(s): 26 - 29
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1432 KB) |  | HTML iconHTML  

    Integrating amplification with power combining allows components to be eliminated thereby reducing system size. Recently there has been much interest in reducing size of planar circuit components that use transmission lines, and therefore, combining strategies that employ transmission elements can leverage on these miniaturization techniques to further reduce system size. In this paper we explore the dual-fed distributed power amplifier and a variant that uses periodic loops of transmission lines. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dielectric Resonator Filters for UMTS Systems

    Page(s): 30 - 33
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2105 KB) |  | HTML iconHTML  

    Dielectric Resonator filters can provide high selectivity and low insertion loss similar to cavity filters but with smaller size and weight. They have long been used in satellite communication and more recently became of significant interest in terrestrial applications. In this paper the design of two UMTS dielectric filters (transmit and receive) have been presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Miniaturization and Dual-Band Operation in Planar Microwave Components by Using Resonant-Type Metamaterial Transmission Lines

    Page(s): 34 - 37
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1610 KB) |  | HTML iconHTML  

    In this work, it is shown that dual-band microwave components based on plusmn90deg metamaterial transmission lines can be miniaturized by implementing the artificial lines by means of complementary spiral resonators (CSRs). Such lines exhibit a composite right/left handed (CRLH) behavior. Dual-band operation is achieved by designing the lines to provide a phase of -90o at the lower operating frequency (within the left handed band) and +90o phase shift at the upper frequency (within the right handed band). Size reduction, as compared to conventional implementations, is achieved by implementing the lines with a single unit cell, and thanks to the small electrical size of CSRs. To illustrate the possibilities of the approach, a dual-band branch-line coupler based on metamaterial transmission lines implemented by means of CSRs is presented. The device has been designed to be functional at the mobile GSM bands (f1= 0.9 GHz, f2= 1.8 GHz). As compared to the conventional branch line, a 40% size reduction is obtained. The approach is fully compatible with planar technology. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of Compact Orthomode Transducers

    Page(s): 38 - 42
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1868 KB) |  | HTML iconHTML  

    This paper presents the design of compact orthomode transducers (OMTs). Analysis methods for waveguide OMTs, including the mode-matching method and hybrid methods, are briefly reviewed. Three types of compact OMTs are described: a dielectric-filled OMT with reduced size, a planar OMT implementing using substrate integrated waveguide, and a dual band Tx/Rx OMT with a compact diaphragm to improve isolation. The dual-band Tx/Rx and SIW OMTs are verified by measurements. Challenges for designing multi-band OMTs with compact size are also pointed out. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Miniaturized Hairpin Tunable Filter with the Single Control Voltage

    Page(s): 43 - 46
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1444 KB) |  | HTML iconHTML  

    This paper presents a varactor-tuned miniaturized hairpin tunable filter employing single control voltage. The proposed tunable filter is designed and fabricated with the constant ratio rule in which the capacitances of the each stage maintains a constant ratio without any dependency on the miniaturized electrical length. As a result, the filter can be tuned with the reserved equivalent condition using a single control voltage. To show the validity of the proposed method, a third-order 0.5 dB ripple Chebyshev filter with a center frequency of 900 MHz and a fractional bandwidth(FBW) of 10% was designed and fabricated. The measured center frequency of the fabricated filter is changed from 606 MHz to 944 MHz, 338 MHz with the single control voltage from 0.5 V to 4 V. Expect of slight change of the bandwidth, the measured filter characteristics are well reserved with the various control voltage. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Planar Quasi-Elliptic Filters with Inline EM Coupled Open-Loop Resonators

    Page(s): 47 - 50
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1386 KB) |  | HTML iconHTML  

    This paper describes the planar quasi-elliptic filters with EM coupled open-loops having an inline resonator alignment. For two coupled open-loops, the coupled sides with the maximum magnetic field are combined with their open gaps with the maximum electric field, creating the mixed electric and magnetic coupling. By adjusting the distance between this two loops and gap position of each loop, a desired coupling coefficient and a controllable transmission zero can be simultaneously obtained. The shapes of the open-loop can be either a rectangle or triangle, but the latter is preferred to the former since the coupling between the EM coupled triangular pairs is tighter and more controllable. A backed aperture can be etched on the ground plane underneath the coupled lines of two adjacent loops to further enhance both electric and magnetic coupling, and to help to realize a wider bandwidth and closer-to-passband transmission zero. High order filters can be constructed by cascading several EM coupled open-loop pairs to create multiple transmission zeros. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Miniature Dual-Mode Microstrip Bandpass Filters with Enhanced Parasitic Coupling

    Page(s): 51 - 54
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1917 KB) |  | HTML iconHTML  

    We report the results of an investigation into dual-mode operation of microstrip loop resonator based on meander slow wave structure, and its applications for designing miniature dual-mode bandpass filters. A new feed arrangement for the miniature dual-mode filters is also proposed and investigated in detail. The feed arrangement supports the proposed enhanced coupling between I/O ports of the filter. Both calculated and measured results for two-pole and four-pole dual-mode filters are presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Double Side Parallel Strip Line and its Applications

    Page(s): 55 - 58
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1876 KB) |  | HTML iconHTML  

    The recent researches on double side parallel strip line (DSPSL) in City University of Hong Kong are introduced in this paper. DSPSL and its newly proposed variations have been finding more and more applications in microwave passive and active components for miniaturizing and performance improving. Several components based on DSPSL will be discussed in this paper. A novel solution for the exploiting DSPSL in MMIC design is proposed at the end of the paper. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Economical Compact Filters with Coupled Shorting Stubs

    Page(s): 59 - 62
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1056 KB) |  | HTML iconHTML  

    A compact filter with coupled shorting stubs is proposed, which also has excellent out-of-band elimination. The structure can produce transmission zeros at both sides of the pass-band of a broadband or a narrow band filter. The configuration parameters and simulated results are presented. Tested results from a sample filter show that the insertion loss is lower than 0.4 dB in the pass-band from 7.65 GHz to 8.7 GHz and elimination higher than 40 dB from 8.81 GHz up. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Miniaturization Techniques of Substrate Integrated Waveguide Circuits

    Page(s): 63 - 66
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1580 KB) |  | HTML iconHTML  

    Substrate integrated waveguide (SIW) has become popular and it has widely been used in microwave and millimeter wave circuit and system designs. Compared to other planar transmission lines, the geometrical dimension, in particular, the width of an SIW is much larger, which depends on the operating frequency and substrate material. Therefore, an effective SIW miniaturization is required for developing a high-density integration in circuit design. In this paper, three miniaturization techniques of SIW circuits are discussed in order to achieve a high compression ratio. A group of SIW transmission lines based on these miniaturization techniques are analyzed and their propagation constants and quality factors are extracted for comparison. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shunt-Loaded Fractal-Meandered Microstrip

    Page(s): 67 - 70
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1094 KB) |  | HTML iconHTML  

    The fractal meandering approach to microstrip circuit miniaturization is limited by the need to maintain characteristic impedance. In this work we show that uniform and non-uniform shunt loading can be used yield a further level of miniaturization of Koch fractal meandered microstrips and is applied to the miniaturization of a 1 GHz bandstop filter. The miniaturized filter has an area 11% of the area of a filter using straight microstrips alone, and 57% of the area of a filter miniaturized by second order fractal meandering alone. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modified Small Asymmetric Impedance Transformers

    Page(s): 71 - 74
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (816 KB) |  | HTML iconHTML  

    In this paper, modified small asymmetric impedance transformers are suggested. The impedance transformers should transform a real impedance into another one. For this purpose, design technique, being able to transform a complex impedance (admittance) into a real impedance (admittance) only with a transmission-line section, is required. Using this, two types of modified ones are introduced and simulated at a design center frequency of 1 GHz. Their simulation results show considerable bandwidths compared with their sizes. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A 11~20GHz Switched Filter Bank for Software Defined Radio System

    Page(s): 75 - 78
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1706 KB) |  | HTML iconHTML  

    This paper presents the development of a low cost switched filter bank module for a wideband software defined radio system. The four-channel switched filter bank module operating in the frequency range of 11~20 GHz has been developed using six single-pole double-throw (SPDT) switching networks, and four fixed five-pole edge-coupled bandpass filters, which is modified from the typical edge-coupled microstrip bandpass filter in the input and output (I/O) feeders to achieve the better stopband performance. The filters and switched filter bank are introduced theoretically and experimentally. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.