Stub (electronics)

About: Stub (electronics) is a research topic. Over the lifetime, 8172 publications have been published within this topic receiving 75018 citations.

Stub-Loaded Reactive Decoupling Network for Two-Element Array Using Even–Odd Analysis

Abstract: A stub-loaded reactive decoupling network is investigated in this letter for two-element closely spaced array. The proposed topology, consisting of a pair of connecting lines and a T-shaped neutralized section, is developed based on the even/odd-mode analysis. The proposed scheme is able to deal with the matching and decoupling requirements in the even and odd modes separately and, hence, able to achieve overall good impedance matching and excellent port isolation simultaneously for an arbitrary two-element closely spaced array. The design concept, formulation, and experimental results will be introduced.

Wideband quasi‐yagi antenna fed by microstrip‐to‐slotline transition

Abstract: This letter presents a wideband quasi-Yagi antenna fed by a microstrip-to-slotline transition. The transition consists of a microstrip radial stub and slot radial stub, both at 90° but with different radii, to achieve wideband impedance matching. The antenna has a measured fractional bandwidth of approximately 46% (4.64–7.42 GHz) for a −10 dB reflection coefficient and a flat gain of 6.0–6.75 dBi with a front-to-back ratio and cross-polarization level better than 17 and −15 dB, respectively, across the bandwidth. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:150–153, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26504

A new simple and accurate formula for microstrip radial stub

Abstract: A closed-form formula is derived for the input impedance of the microstrip radial stub. The formula combines the simplicity of the radial transmission line approach and the accuracy of the resonant mode expansion technique. >

Variable optical attenuator

Abstract: The variable optical attenuator (1) comprises two spherical lenses (7, 8), one at the input end and one at the output end, between which a bundle of parallel rays is present. A disk (4) having areas (9) with neutral density filters (10) of different attenuation is rotatable through the bundle of rays. A locking mechanism (13, 14, 15) acts on a stub shaft (11) at the disk (4), and its stop positions correspond to the locations of the areas (9). This permits the attenuation of the attenuator (1) to be adjusted in steps.

Stub-Loaded Theory and Its Application to Balanced Dual-Band Bandpass Filter Design

Abstract: Novel stub-loaded theory is presented and applied to design balanced dual-band bandpass filter with independently controlled passband frequencies and bandwidths. According to the presented stub-loaded theory, the first differential-mode resonance can be independently designed by the loaded stubs, while not affecting the second one. Besides, except for the main coupling path, one more coupling path between the loaded stubs can be used to independently control the coupling coefficient of the first passband. Therefore, both the passband frequencies and bandwidths of each differential passband can be easily designed. To validate the proposed idea, the balanced dual-band BPF is designed, simulated and measured. Simulated and measured results are well agreed.