Compact Nanosecond Pulse Generator Based on Printed Circuit Board Transmission Lines and Solid-State Switches

2017 ◽  
pp. 1-23
Author(s):  
Yan Mi ◽  
Jialun Wan ◽  
Yanyuan Zhang
Keyword(s):  
Solid State ◽  
Transmission Lines ◽  
Printed Circuit Board ◽  
Pulse Generator ◽  
Nanosecond Pulse ◽  
Circuit Board ◽  
Printed Circuit

PENGARUH DIMENSI GEOMETRIK LAMPU LED TERHADAP PERSEPSI KECERAHAN

2013 ◽  
Vol 3 (2) ◽  
pp. 41
Author(s):  
Andrea Marisi ◽  
Revantino Revantino
Keyword(s):  
Solid State ◽  
Printed Circuit Board ◽  
Light Emitting Diode ◽  
Circuit Board ◽  
Solid State Lighting ◽  
Light Emitting ◽  
Printed Circuit ◽  
Surface Mounting

Perkembangan teknologi di bidang Solid State Lighting selama dekade terakhir membuat diversifikasi penggunaan Light Emitting Diode untuk pelayanan pencahayaan umum. Balai Besar Bahan dan Barang Teknik sejak tahun 2011 telah melakukan penelitian dan pengembangan lampu LED berbasis Surface Mounting Device (SMD) 5050. Pada perancangan Printed Circuit Board (PCB) untuk memasangkan LED-smd tersebut, dilakukan analisis dimensi geometrik yang optimal sehingga dapat memancarkan cahaya ke segala arah dan memberikan persepsi kecerahan yang lebih baik. Untuk perancangan PCB tersebut, dipilih 2 (dua) model berbentuk silinder dengan memperhatikan rasio antara tinggi dan diameter alas. Dari pendekatan sumber titik dan perhitungan eksitansi luminus, diperoleh bahwa model dengan rasio ≈ 1 menghasilkan persepsi lebih cerah terhadap visual manusia.Kata kunci : dimensi geometrik, pendekatan sumber titik, eksitansi luminus, persepsi kecerahan

Miniaturized branch-line coupler based on slow-wave microstrip lines

2018 ◽  
Vol 10 (10) ◽  
pp. 1103-1106 ◽  
Author(s):  
H. Alhalabi ◽  
H. Issa ◽  
E. Pistono ◽  
D. Kaddour ◽  
F. Podevin ◽  
...  
Keyword(s):  
Slow Wave ◽  
Transmission Lines ◽  
Insertion Loss ◽  
Return Loss ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Wave Effect ◽  
Branch Line ◽  
Printed Circuit ◽  
Microstrip Lines

AbstractThis paper presents a miniaturized 3-dB branch-line coupler based on slow-wave microstrip transmission lines. The miniaturized coupler operating at 2.45 GHz is designed and implemented on a double-layer printed circuit board substrate with blind metallic vias embedded in the lower substrate layer providing the slow-wave effect. Based on this concept, a 43% size miniaturization is achieved as compared with a classical microstrip branch-line coupler prototype. The measured S parameters present a return loss of 25.5 dB and an average insertion loss equal to 0.05 dB at the operating frequency.

scholarly journals Set of measuring test fixtures for PCB materials research

2019 ◽  
Vol 30 ◽  
pp. 07003
Author(s):  
Aleksei Rakov ◽  
Vladimir Zhukov ◽  
Artem Kukanov ◽  
Vladimir Ukhandeev
Keyword(s):  
Transmission Lines ◽  
Printed Circuit Board ◽  
Measurement Methods ◽  
Circuit Board ◽  
Test Vehicle ◽  
Printed Circuit ◽  
Measurement Results ◽  
Materials Research ◽  
Electro Magnetic

Designed and manufactured set of measuring test fixtures for printed circuit board (PCB) materials research and characterization is described in this article. Attention is paid to special designed test vehicle “General board” which includes six types of transmission lines that are used for PCB materials characterization by two measurement methods. Measurements of the frequency dependencies of the dielectric constant and dielectric loss for a number of the most widely used PCB substrates are presented. The comparison of the measurement results made by two measurement methods is also shown. The influence of the inhomogeneities of the PCB dielectric and some differences in the extracted material parameters data correlated with electro-magnetic fields structure in different transmission lines is demonstrated. In addition it is shown that measurements performed using “General board” can be used for characterization of the losses due to PCB surface plating.

Laser Etching and Cutting Printed Circuit Board by 355 nm and 1064 nm Diode Pumped Solid State Lasers

2008 ◽  
Vol 35 (10) ◽  
pp. 1637-1643 ◽  
Author(s):  
张菲 Zhang Fei ◽  
曾晓雁 Zeng Xiaoyan ◽  
李祥友 Li Xiangyou ◽  
段军 Duan Jun
Keyword(s):  
Solid State ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Solid State Lasers ◽  
Laser Etching ◽  
Printed Circuit ◽  
Diode Pumped

Numerical and experimental analysis of a heat-pipe-embedded printed circuit board for solid state lighting applications

2017 ◽  
Vol 32 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Thamer Khalif Salem ◽  
Ferina Saati Khosroshahi ◽  
Mehmet Arık ◽  
Mohammad O. Hamdan ◽  
Mete Budakli
Keyword(s):  
Solid State ◽  
Heat Pipe ◽  
Experimental Analysis ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Solid State Lighting ◽  
Printed Circuit

A modified model of conductor roughness for manufacturing copper lines of printedcircuit board

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chong Wang ◽  
Yingjie Wang ◽  
Kegu Adi ◽  
Yunzhong Huang ◽  
Yuanming Chen ◽  
...  
Keyword(s):  
Current Distribution ◽  
Transmission Lines ◽  
Design Methodology ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Modified Model ◽  
Content Type ◽  
Accurate Model ◽  
Printed Circuit ◽  
Industrial Manufacturing

Purpose The purpose of this paper is to establish an accurate model to quantify the effect of conductor roughness on insertion loss (IL) and provide improved measurements and suggestions for manufacturing good conductive copper lines of printed circuit board. Design/methodology/approach To practically investigates the modified model of conductor roughness, three different kinds of alternate oxidation treatments were used to provide transmission lines with different roughness. The IL results were measured by a vector net analyzer for comparisons with the modified model results. Findings An accurate model, with only a 1.8% deviation on average from the measured values, is established. Compared with other models, the modified model is more reliable in industrial manufacturing. Originality/value This paper introduces the influence of tiny roughness structures on IL. Besides, this paper discusses the effect of current distribution on IL.

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