Diplexer Overview

2020 ◽  
pp. 1-42
Keyword(s):  
Literature Review ◽  
Radio Frequency ◽  
Transmission Line ◽  
Design Method ◽  
Coplanar Waveguide ◽  
Substrate Integrated Waveguide ◽  
Design And Implementation

This chapter gives an overview of the microwave diplexer, starting with a background into the radio frequency and the microwave spectrums. The chapter also covers the aims and objectives of the book, the motivation, and the diplexer design method discussed in the book. A detailed literature review into the various diplexer design and implementation approaches is also detailed in this chapter. The chapter also looks at a number of transmission line technologies that have been utilised in the implementation of microwave diplexers including slotline, stripline, coplanar waveguide, microstrip, waveguide, and the substrate integrated waveguide (SIW). The microstrip and the SIW implementations of the diplexer is reviewed in more detail, with numerous existing research examples. The chapter concludes by highlighting the emerging research and the opportunities in diplexer design introduced and established in the book.

A Novel Design of Substrate Integrated Waveguide (SIW) E-Plane Inductive Strip Filter Implemented Using LTCC

2011 ◽  
Vol 8 (3) ◽  
pp. 121-128
Author(s):  
Ehab Abousaif ◽  
Aicha Elshabini ◽  
Fred Barlow
Keyword(s):  
Filter Design ◽  
Dielectric Material ◽  
Design Method ◽  
Coplanar Waveguide ◽  
Variation Principle ◽  
Band Pass Filter ◽  
Substrate Integrated Waveguide ◽  
Pass Filter ◽  
Metallic Strip ◽  
Design Steps

Low-temperature cofired ceramic (LTCC) was used for a novel band-pass filter design. The filter is based on metallic strips parallel to the E-plane and mounted in a substrate-integrated waveguide (SIW). A new iterative technique based on the variation principle was used to obtain the inductive reactance of equivalent T-network of the metallic strip. The design method of the filter was derived by applying the equivalent network of the metallic strip to the usual method of the filter design. A set of curves relating the various filter parameters is introduced. This filter was designed such that it is electromagnetically isolated inside the SIW and excited using grounded coplanar waveguide (GCPW) to SIW transitions; therefore, it can be easily integrated with MMICs. The design steps are explained and verified by examples and results. Three-dimensional electromagnetic field modeling and simulation was carried out using a high frequency structure simulator (HFSS). A comparison between different types of SIW is presented showing the resulting S-parameter curves for each case. By following the design steps, similar filters for various frequency bands using any dielectric material can be easily designed.

DIVSYS: Design and Implementation of VHF Messaging System Using Amateur Radio Frequency of 144 MHz Band

2020 ◽  
Author(s):  
Gerhard P. Tan ◽  
Jomer V. Catipon ◽  
Patrick Jiorgen U. Hulipas ◽  
Allysa Mae E. Bartolome ◽  
Micah Abegail P. Inosanto ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Design And Implementation ◽  
Amateur Radio

Development on Environmental Geotechnology for Overhead Transmission Line Foundation Engineering in China

2012 ◽  
Vol 610-613 ◽  
pp. 2813-2818
Author(s):  
Xian Long Lu ◽  
Zeng Zhen Qian
Keyword(s):  
Transmission Line ◽  
Environmental Protection ◽  
Transmission Lines ◽  
Water Conservation ◽  
Design Method ◽  
Foundation Engineering ◽  
Foundation Construction ◽  
Overhead Transmission Line ◽  
Tower Foundation ◽  
Soil And Water

This paper presents the concept and the fundamental issues and the development on the environmental geotechnology in transmission lines foundation engineering. Namely, environmental geotechnology and theory is to study the restriction effects of environment on the transmission line routes, foundation selection and reliability, to predict the results of transmission line foundation construction on the environment, and to study on countermeasures of environmental protection in transmission foundation engineering. And then, from the above three aspects, the design method combined strength and displacement for tower foundation, the selection on foundation types and technical scheme for transmission line tower, and the countermeasures for soil and water conservation, the author introduces the development and practice of environmental geotechnology for transmission lines foundation engineering in China.

Design and Implementation of Point Symbol Database Based on ArcGIS Engine

2012 ◽  
Vol 263-266 ◽  
pp. 1853-1857
Author(s):  
Mao Lin Wang ◽  
Ai Jun Xu
Keyword(s):  
Design Process ◽  
Design Method ◽  
Word Type ◽  
Design Framework ◽  
Design And Development ◽  
Design And Implementation ◽  
Arcgis Engine ◽  
Point Symbol

In this article, geometric primitive approach is used to realize the design and development of point symbol database for mapping based on C# .NET and ArcGIS Engine. This paper presents the design framework and the design process of point symbol database, and studies design method and attribute management of point symbol, especially the design of point symbol attribute of word type of TrueType, which makes conveniently the point symbol for special map users needed.

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