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Insertion loss

About: Insertion loss is a(n) research topic. Over the lifetime, 23045 publication(s) have been published within this topic receiving 272553 citation(s). more


Journal ArticleDOI: 10.1109/50.476137
Abstract: We present a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters. Photoinduced periodic structures written in the core of standard communication-grade fibers couple light from the fundamental guided mode to forward propagating cladding modes and act as spectrally selective loss elements with insertion losses act as backreflections <-80 dB, polarization-mode-dispersions <0.01 ps and polarization-dependent-losses <0.02 dB. more

Topics: Long-period fiber grating (64%), Cladding mode (60%), Cladding (fiber optics) (57%) more

1,637 Citations

Journal ArticleDOI: 10.1109/7260.914305
Dominic Deslandes1, Ke WuInstitutions (1)
Abstract: Usually transitions from microstrip line to rectangular waveguide are made with three-dimensional complex mounting structures. In this paper, a new planar platform is developed in which the microstrip line and rectangular waveguide are fully integrated on the same substrate, and they are interconnected via a simple taper. Our experiments at 28 GHz show that an effective bandwidth of 12% at 20 dB return loss is obtained with an in-band insertion loss better than 0.3 dB. The new transition allows a complete integration of waveguide components on substrate with MICs and MMICs. more

Topics: Post-wall waveguide (70%), Microstrip (65%), Insertion loss (57%) more

1,479 Citations

Journal ArticleDOI: 10.1038/NPHOTON.2006.42
01 Jan 2007-Nature Photonics
Abstract: On-chip optical buffers based on waveguide delay lines might have significant implications for the development of optical interconnects in computer systems. Silicon-on-insulator (SOI) submicrometre photonic wire waveguides are used, because they can provide strong light confinement at the diffraction limit, allowing dramatic scaling of device size. Here we report on-chip optical delay lines based on such waveguides that consist of up to 100 microring resonators cascaded in either coupled-resonator or all-pass filter (APF) configurations. On-chip group delays exceeding 500 ps are demonstrated in a device with a footprint below 0.09 mm2. The trade-offs between resonantly enhanced group delay, device size, insertion loss and operational bandwidth are analysed for various delay-line designs. A large fractional group delay exceeding 10 bits is achieved for bit rates as high as 20 Gbps. Measurements of system-level metrics as bit error rates for different bit rates demonstrate error-free operation up to 5 Gbps. more

Topics: Group delay and phase delay (57%), Insertion loss (54%), Photonics (53%) more

1,121 Citations

Journal ArticleDOI: 10.1109/22.780402
Abstract: This paper presents a novel photonic bandgap (PBG) structure for microwave integrated circuits. This new PBG structure is a two-dimensional square lattice with each element consisting of a metal pad and four connecting branches. Experimental results of a microstrip on a substrate with the PEG ground plane displays a broad stopband, as predicted by finite-difference time-domain simulations. Due to the slow-wave effect generated by this unique structure, the period of the PBG lattice is only 0.1/spl lambda//sub 0/ at the cutoff frequency, resulting in the most compact PEG lattice ever achieved. In the passband, the measured slow-wave factor (/spl beta//k/sub 0/) is 1.2-2.4 times higher and insertion loss is at the same level compared to a conventional 50-/spl Omega/ line. This uniplanar compact PBG (UC-PBG) structure can be built using standard planar fabrication techniques without any modification. Several application examples have also been demonstrated, including a nonleaky conductor-backed coplanar waveguide and a compact spurious-free bandpass filter. This UC-PBG structure should find wide applications for high-performance and compact circuit components in microwave and millimeter-wave integrated circuits. more

Topics: Coplanar waveguide (56%), Microstrip (55%), Stopband (54%) more

819 Citations

Journal ArticleDOI: 10.1109/TMTT.2002.807820
Dominic Deslandes1, Ke Wu1Institutions (1)
Abstract: The integrated planar technique has been considered as a reliable candidate for low-cost mass production of millimeter-wave circuits and systems. This paper presents new concepts that allow for a complete integration of planar circuits and waveguide filters synthesized on a single substrate by means of metallized post (or via-hole) arrays. Analysis of the synthesized integrated waveguide and design criteria are presented for the post pitch and diameter. A filter design method derived from a synthesis technique using inductive post is presented. An experimental three-pole Chebyshev filter having 1-dB insertion loss and return loss better than 17 dB is demonstrated. Integrating such planar and nonplanar circuits on a substrate can significantly reduce size, weight, and cost, and greatly enhance manufacturing repeatability and reliability. more

Topics: Waveguide filter (59%), Chebyshev filter (57%), Filter design (55%) more

792 Citations

No. of papers in the topic in previous years

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Topic's top 5 most impactful authors

Gabriel M. Rebeiz

95 papers, 5K citations

Ke Wu

89 papers, 5.6K citations

Quan Xue

48 papers, 871 citations

Yong Fan

46 papers, 407 citations

Kaijun Song

45 papers, 651 citations

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