bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of slot geometry on linearly polarized radial line slot array characteristics
Authors: Subbarao B. , Fusco V. F.
Published: September 2002

This Letter demonstrates low cross polarization with improved return loss and bandwidth for a single concentric ring linearly polarized radial line slot array (LPRLSA) operating at 10.65 GHz, gain 14 dB. This was acheived by narrowing the slot width and optimizing the placement of each slot pair relative to the edge of a short‐circuited radial waveguide. Measured return loss and cross polarization levels were better than −20 dB over a 10% bandwidth (cf. 3.5% previously reported) at VSWR of 2. The measured and simulated fa‐ field patterns are presented. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 14–16, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10503
The effect of grating‐position deviation and fiber dispersion in the fiber‐optic–CDMA network with the FBG encoder/decoder for incoherent 2D coding
Authors: Wang X. , Chan K.T.
Published: September 2002

The effect of grating‐position deviation (GPD) and fiber dispersion in a fiber‐optic–CDMA network with a FBG encoder/decoder for incoherent 2D coding are studied here. For error‐free transmission, the GPD‐caused maximum optical pulse‐position deviation (PPD) must be below Δm, and the transmission distance must be below Lm. A modified encoder/decoder configuration is proposed to compensate for the fiber dispersion. With this proposed encoder/decoder, the user's distances in a network can be improved to L ± Lm. Error‐free transmission has been achieved through 9.5‐km SMF in the experiment with this design. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 16–19, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10504
Mixed coupling structure for the cross coupling of comb‐line filters
Authors: Kim Byungwook , Kim Young‐Soo
Published: September 2002

A mixed coupling structure is proposed for the cross coupling of a comb‐line filter. The proposed structure consists of an electric coupling probe and a magnetic coupling window, and the coupling required for the cross coupling of a cross‐coupled filter can be achieved with much easier tuning capability than the structure with only an electric probe. A four‐pole comb‐line filter is designed and fabricated with the use of the proposed structure, and showed good filter response. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 20–23, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10505
Quasi‐static parameters, low‐frequency solutions, and full‐wave solutions of a single‐layered via
Authors: Li Qin , Tsang Leung , Chen Houfei
Published: September 2002

The problem of a single‐layered via through two parallel ground planes is studied. The problem is decomposed into the exterior problem and the interior problem. For each problem, the quasi‐static solution, the full‐wave solution, and the low‐frequency solution are studied. The exterior solutions and the interior solutions are then combined to give the overall characteristics. Different combinations can be made. In solving the interior part with the quasi‐static approach, the aperture of the via hole is replaced by the equivalent source. The Green's function between two PEC planes is used to form the surface integral equation, and the MoM is used to extract the capacitance. The extracted quasi‐static results are compared with those from the low‐frequency and full‐wave solutions. It is shown that the capacitance from the full‐wave approach is very weakly frequency dependent and compares well with that from the quasi‐static approach at the frequency range of interest. The inductance of the interior part is found to be infinity with the magneto‐static approach. Thus the quasi‐static solution cannot be used for the interior problem to find the inductance. On the other hand, the inductance based on the full‐wave solution is strongly frequency dependent. It is also shown in this article that the combination of the quasi‐static solution for the exterior problem and the full wave for the interior problem gives good performance in terms of both accuracy and CPU requirements. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 34–40, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10508
FET power combining with the use of the balanced single‐ended dual‐fed distributed amplifier approach
Authors: Eccleston K. W. , Kyaw O.
Published: September 2002

A balanced amplifier employing two identical single‐ended dual‐fed distributed amplifiers is demonstrated to be a viable approach for combining FET output power. The FETs are spaced 180° to ensure all FETs have identical load lines, which are chosen optimally. The configuration uses all FET output power and has good port match. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 42–45, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10510
Dual‐feeding microstrip antenna with high isolation
Authors: Kim Hyungrak , Kwon Jonghun , Yoon Youngjoong , Yoon Jaeseung , Jeon Soonik
Published: September 2002

In this Letter, a dual‐feeding structure with microstrip and an H‐shaped aperture feeding for a microstrip antenna is proposed to achieve high isolation with high gain, easy feeding, and few layers. The measured isolations of the proposed single and 1 × 4‐array antenna along the E plane of the aperture feeding are less than −49 and −48 dB, respectively. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 45–47, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10511
Wire media with negative effective permittivity: A quasi‐static model
Authors: Maslovski S. I. , Tretyakov S. A. , Belov P. A.
Published: September 2002

In this Letter artificial media formed by dense arrays of parallel conducting wires are considered. A simple analytical model for the effective permittivity is derived from quasi‐static considerations. The result gives a formula for the permittivity in terms of the geometrical parameters and the frequency. The analysis covers lossy and loaded wires as well. The phenomena that lead to negative permittivity values are discussed. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 47–51, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10512
Extraction of rate‐equation parameters from optical modal gain measurements for multiple‐quantum‐well semiconductor lasers
Authors: Wartak M. S. , Weetman P. , Alajoki T. , Aikio J. , Heikkinen V.
Published: September 2002

Rate equations for multiple‐quantum‐well (MQW) laser structure with carrier transport effects and advanced models of optical modal gain were used to extract relevant laser's parameters used in simulations. The many‐body effects of bandgap renormalization, Coulombic scattering interactions, and a non‐Markovian distribution were included in gain calculations. The importance of carrier leakage for that particular structure is indicated. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 55–56, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10514
Picosecond pulse generation for visible semiconductor laser operating at 650‐nm wavelength with the use of the gain‐switching technique
Authors: Oh Kwang H. , Hwang N. , Koh J. S. , Kim Dug Y.
Published: September 2002

Various characteristics of a gain‐switched InGaAlP Fabry–Perot semiconductor laser operating with a center wavelength of 650 nm for short‐distance ultra‐fast optical transmission applications. The optimum gain switching conditions are studied in detail with this semiconductor laser. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 65–67, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10517
Operating characteristics of an optical filter in metallic photonic bandgap materials
Authors: Srivastava Sanjeev K. , Ojha S. P.
Published: September 2002

In this Letter a new analysis of an optical filter using a metallic photonic bandgap material on the microscopic scale is reported. The proposed filter is capable of working over a wide range of the electromagnetic spectrum and the idea is based on the famous Kronig–Penny model in the solid state. The periodic structure consisting of different conducting materials and dielectrics (air) are considered. The structure is also able to pass the light emitted by a He–Ne laser source by choosing the appropriate values of the controlling parameters, and thus this may act as an efficient monochromator. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 68–71, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10518
Waveguide‐fed planar antennas for millimeter waveband
Authors: Marzolf Eric , Drissi M'hamed
Published: September 2002

Planar antenna structures for broadband applications in the millimeter‐wave band at 60 GHz are investigated experimentally. Feeding through a waveguide is used to achieve high performances such as wide‐bandwidth operation and to enable a choice of designs by means of a low‐cost technological process. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 71–73, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10519
Narrow‐linewidth wavelength‐tunable fiber laser controlled by intracavity feedback‐injected Fabry–Perot laser diode
Authors: Lin Gong‐Ru
Published: September 2002

Narrow‐linewidth and wavelength‐tunable operation of erbium‐doped fiber laser (EDFL) by optically feedback‐injecting an intracavity Fabry–Perot laser‐diode (FPLD) driven at nearly threshold condition is demonstrated. An optimized lasing linewidth and a side‐mode suppressing ratio of 0.1 nm and >27 dB are obtained, respectively. Linear wavelength tuning of >4 nm by adjusting temperature of FPLD from 20 to 45 °C is reported. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 73–75, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10520