IEEE Transactions on Microwave Theory and Techniques

Volume 61 Issue 12  Part 1 • Dec. 2013

This issue contains several parts.Go to:  Part 2

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Displaying Results 1 - 25 of 36

Publication Year: 2013, Page(s):C1 - C4
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• IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2013, Page(s): C2
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• Reduced Integral Equations for Coupled Resonators Related Directly to the Lumped Equivalent Circuit

Publication Year: 2013, Page(s):4021 - 4028
Cited by:  Papers (1)
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The coupling coefficient between two resonators is conventionally found from the two resonant frequencies. To find these frequencies in distributed structures, full wave frequency domain eigenvalue analysis is required. This process can be quite lengthy, since it has to be repeated at each design iteration. In addition, In cases with multiple resonators, this method is applied to each pair of reso... View full abstract»

• Skin-Effect-Incorporated Transient Simulation Using the Laguerre-FDTD Scheme

Publication Year: 2013, Page(s):4029 - 4039
Cited by:  Papers (9)
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In this paper, skin effect is incorporated into the unconditionally stable Laguerre finite-difference time-domain method for transient simulation of multiscale structures. The skin effect is modeled by imposing the surface impedance boundary condition (SIBC) to the surface of the conductor, which significantly reduces the computational effort. Two methods of applying SIBC are proposed and discusse... View full abstract»

• Design of Dispersive Delay Structures (DDSs) Formed by Coupled C-Sections Using Predistortion With Space Mapping

Publication Year: 2013, Page(s):4040 - 4051
Cited by:  Papers (5)
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The concept of space mapping is applied, for the first time, to the design of microwave dispersive delay structures (DDSs). DDSs are components providing specified group delay versus frequency responses for real-time radio systems. The DDSs considered in this paper are formed by cascaded coupled C-sections. It is first shown that aggressive space mapping does not provide sufficient accuracy in the... View full abstract»

• Balanced-to-Balanced Gysel Power Divider With Bandpass Filtering Response

Publication Year: 2013, Page(s):4052 - 4062
Cited by:  Papers (27)
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In this paper, the balanced-to-balanced Gysel power divider is proposed with bandpass filtering response for the first time. The component is based on a ring structure and designed with an extended coupled-resonator circuit model. The characteristic impedances, electrical lengths, and isolation resistance are calculated analytically by our derived equations, according to the design specifications ... View full abstract»

• Using Phase Relations in Microstrip Directional Couplers to Achieve High Directivity

Publication Year: 2013, Page(s):4063 - 4071
Cited by:  Papers (5)
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We analyze the microstrip directional couplers with a special focus on the phase difference between the coupled and isolated ports. The analysis uses the even-odd mode decomposition technique and network theory. The results show that the phase difference between the signals at the coupled port and the isolated port is close to π in a very wide band. This property can be used to achieve a br... View full abstract»

• The Design of Miniature Multilayer Bandpass Filters With Mixed Couplings

Publication Year: 2013, Page(s):4072 - 4078
Cited by:  Papers (7)
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This paper introduces a new design process for miniature coupled resonator filters with mixed couplings, which can better preserve wideband response matching with coupling matrix prototype. A special type of matrix transformation is introduced in this paper to transform the coupling matrix into a configuration that consists of an equal number of capacitive and inductive main couplings. Based on th... View full abstract»

• Design of Single-Branch Laminated Waveguide Diplexers Using Modal Orthogonality

Publication Year: 2013, Page(s):4079 - 4089
Cited by:  Papers (5)
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This paper develops novel laminated waveguide diplexers by taking advantage of the modal orthogonality of multiple cavity modes. The uplink and downlink channels of the diplexer can share a common filter structure, which minimizes the number of the cavities. The feeding probes and coupling slots are adequately located to achieve the required coupling coefficients and external quality factors at bo... View full abstract»

• Design and Synthesis Methodology for UHF-RFID Tags Based on the T-Match Network

Publication Year: 2013, Page(s):4090 - 4098
Cited by:  Papers (13)
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A new systematic methodology for the design of T-match based UHF-RFID tags is proposed. The great majority of commercial UHF-RFID tags are based on dipole antennas using a modification of a T-match network. The literature contains examples of models that describe the T-match, but they are not sufficiently accurate to synthesize the tag geometry. Using the proposed methodology, a global band UHF-RF... View full abstract»

• Bandwidth Enhancement of 4 $,times,$4 Butler Matrix Using Broadband Forward-Wave Directional Coupler and Phase Difference Compensation

Publication Year: 2013, Page(s):4099 - 4109
Cited by:  Papers (5)
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A broadband Butler matrix by combining the proposed broadband forward-wave directional coupler and a broadband middle network is proposed. Test samples of both the proposed coupler and Butler matrix are fabricated on Ro4003 and the sizes are 0.4 λg × 0.14 λg and 1.02 λg × 1.17 λg, respectively. For the Butler mat... View full abstract»

• Wideband Planar Transmission Line Hyperbolic Metamaterial for Subwavelength Focusing and Resolution

Publication Year: 2013, Page(s):4110 - 4117
Cited by:  Papers (5)
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We analyze both theoretically and experimentally subwavelength focusing by using a planar hyperbolic metamaterial (HM) at microwave frequencies. The proposed HM consists of microstrip transmission lines (TLs) loaded by lumped components and exhibits a very flat wave vector iso-frequency dispersion diagram over a wide frequency range, and thus able to transport spectral component with large wavenum... View full abstract»

• A 10–67-GHz CMOS Dual-Function Switching Attenuator With Improved Flatness and Large Attenuation Range

Publication Year: 2013, Page(s):4118 - 4129
Cited by:  Papers (17)
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A 4-bit CMOS dual-function switching attenuator is designed using new architecture and method to obtain not only fine attenuation flatness and large attenuation range over an extremely wide frequency range, but also switching ability. Specifically, the inherent frequency responses of conventional Pi-, T- and distributed attenuators are utilized along with the transistor's body-floating technique t... View full abstract»

• Unified Theory of Oscillator Phase Noise II: Flicker Noise

Publication Year: 2013, Page(s):4130 - 4144
Cited by:  Papers (6)
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We present a general theory of oscillator phase-noise for perturbations resulting from both white and flicker noise. Although fundamentally different, both noise sources share in common an underlying principle of analyzing noise in the basis of the oscillator. These similarities allow for an integrated description of noise using a common set of equations. With knowledge of the oscillation power, r... View full abstract»

• Considerations on the ${{ 4 {{NT}}_{rm o} }/{ {T}_{rm m}}}$ Ratio and the Noise Correlation Matrix of Active and Passive Two-Port Networks

Publication Year: 2013, Page(s):4145 - 4153
Cited by:  Papers (5)
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The constraint on the Wiatr-Pospieszalski (WP) parameter ΘWP = 4 NTo/Tm ≤ 2, where N is the Lange invariant and Tm the minimum equivalent noise temperature and To=290 ( K ), has been suggested as a validation tool for the characterization of active microwave devices, despite its acknowledged limitations. This paper provides a sol... View full abstract»

• Constant Mismatch Circles and Application to Low-Noise Microwave Amplifier Design

Publication Year: 2013, Page(s):4154 - 4167
Cited by:  Papers (7)
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Constant input and output mismatch circles in the output load plane are introduced as the basis for low-noise amplifier design methodology. Optimum tradeoff between input and output matching levels results as the application of a design chart providing, at the same time, the corresponding stage transducer gain. The role of degenerative series feedback is studied and systematically embedded in the ... View full abstract»

• Hybrid Current-Mode Class-S Power Amplifier With GaN Schottky Diode Using Chip-On-Board Technique for 955 MHz LTE Signal

Publication Year: 2013, Page(s):4168 - 4178
Cited by:  Papers (4)
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This paper presents a gallium nitride (GaN)-based hybrid current-mode class-S (CMCS) power amplifier (PA) using a bandpass delta-sigma modulator (BPDSM) for a 955-MHz LTE signal. To enhance the drain efficiency of the CMCS PA, the chip-on-board (COB) technique, which can reduce the external parasitic components of the packaged transistor and allow fast switching operation at high frequencies by mi... View full abstract»

• Doherty Power Amplifier With Enhanced Efficiency at Extended Operating Average Power Levels

Publication Year: 2013, Page(s):4179 - 4187
Cited by:  Papers (6)  |  Patents (2)
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This paper proposes an electronically reconfigurable Doherty amplifier capable of efficiently amplifying wireless signals with significant time varying average power. This paper outlines closed-form equations used to design an effective Doherty amplifier that can be driven with signals of variable power levels using a small number of electronically tunable devices. As a proof of concept, a reconfi... View full abstract»

• A Quad-Band Distributed Amplifier With E-CRLH Transmission Line

Publication Year: 2013, Page(s):4188 - 4194
Cited by:  Papers (4)
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A quad-band microstrip distributed amplifier (DA) based on the extended composite right- and left-handed (E-CRLH) transmission lines (TLs) technique is presented. The design procedure to realize the quad-band E-CRLH TLs at four arbitrary frequencies is presented. The quad-band operation is achieved for a DA using three cells, which each consists of a transistor, microstrip line, and E-CRLH . This ... View full abstract»

• A Concurrent Tri-Band Low-Noise Amplifier With a Novel Tri-Band Load Resonator Employing Feedback Notches

Publication Year: 2013, Page(s):4195 - 4208
Cited by:  Papers (8)  |  Patents (1)
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A concurrent tri-band low-noise amplifier (LNA) with a novel feedback tri-band load has been designed around 13.5/24/35 GHz. The feedback tri-band load is composed of two passive LC notch filters with feedback and provides stable and high stopband rejection especially needed in multiband components. It overcomes the dependency of stopband rejection performance on the low quality factor of integrat... View full abstract»

• Adaptive Compensation of Inter-Band Modulation Distortion for Tunable Concurrent Dual-Band Receivers

Publication Year: 2013, Page(s):4209 - 4219
Cited by:  Papers (6)  |  Patents (2)
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For concurrent dual-band receiver with shared radio frequency (RF) front-ends, the received signals are prone to be contaminated by the inter-band modulation components even if the signals are located in distant frequency bands. A novel signal processing technique for blind compensation of nonlinear distortion in concurrent dual-band receiver is presented in this paper. To enhance the performance ... View full abstract»

• A 90-nm CMOS UWB Impulse Radio Transmitter With 30-dB In-Band Notch at IEEE 802.11a System

Publication Year: 2013, Page(s):4220 - 4232
Cited by:  Papers (9)
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In spite of the FCC regulations, the coexistence of ultra-wideband (UWB) and narrowband (NB) systems is still an unsolved challenge. A UWB transmitter (TX) can severely degrade the performance of an IEEE 802.11a system. In this paper, a fully integrated analog impulse-radio UWB TX is presented that generates a novel UWB pulse with a tunable notch at the frequency of IEEE 802.11a system. The pulse ... View full abstract»

• Space Difference Magnetic Near-Field Probe With Spatial Resolution Improvement

Publication Year: 2013, Page(s):4233 - 4244
Cited by:  Papers (3)  |  Patents (1)
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To achieve good spatial resolution, small loop size is required in the traditional loop probe. However, the smaller loop size will lead to lower sensitivity for the probe. In addition, loop size is always limited by the minimum line spacing of the fabrication process. Another problem is that the asymmetric electric field coupling into a probe will not be canceled perfectly even if the structure of... View full abstract»

• Reducing Quantization Noise to Boost Efficiency and Signal Bandwidth in Delta–Sigma-Based Transmitters

Publication Year: 2013, Page(s):4245 - 4251
Cited by:  Papers (6)  |  Patents (1)
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This paper introduces two new techniques to enhance both efficiency and signal bandwidth in delta-sigma-based transmitters. At first step, a technique called quantization noise reduction (QNR), is introduced to enhance the coding efficiency. By filtering out part of the quantization noise in the whole band of the signal, while the signal envelope is maintained almost constant, the coding efficienc... View full abstract»

• Concurrent Dual-Band Six-Port Receiver for Multi-Standard and Software Defined Radio Applications

Publication Year: 2013, Page(s):4252 - 4261
Cited by:  Papers (11)
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This paper proposes a novel concurrent dual-band receiver architecture that uses only one six-port correlator circuit to downconvert two signals in two different bands concurrently. The receiver is reconfigurable over a broadband to simultaneously receive two different signals with different modulation techniques and bandwidths. There are no limitations on the carrier frequencies of the two signal... View full abstract»

Aims & Scope

The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design..

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Editor-in-Chief
Luca Perregrini
luca.perregrini@unipv.it

Editor-in-Chief
Jose Carlos Pedro
edit.tmtt@ua.pt