The document discusses microstrip lines. Microstrip lines consist of a conducting ground plane, dielectric substrate, and a microstrip conductor with a thickness measured in micrometers and a height in millimeters. Microstrip lines have a width-to-height ratio between 0.1 and 10 and propagate electromagnetic waves in the z-direction. While the waves are quasi-TEM, fringing effects cannot be ignored due to the waves not being purely transverse electromagnetic. The document outlines characteristics of microstrip lines such as relative permittivity, effective dielectric constant, wavelength, velocity factor, and characteristic impedance.

1. Microstrip lines
BY
MARYAM LIAQAT
TO
PROF. FREDERICO D. NUNES
FEDERAL UNIVERSITY OF PERNAMBUCO,(UFPE), RECIFE BRAZIL

2. Linhas Microstrip de Transmissão
Microstrip line is consist of a conducting ground,
dielectric substrate and a microstrip having
thickness is in micrometer and height in milímetro

3. Properties
Practical Microstrip Lines has the following Properties,
 Height is of milímetro
 Have width-to-height ratio (u=w/h)
0.1<u<10
 Propagating in Z-direction

4.  Fringing Effect can not ignored because The
electromagnetic waves are not purely TEM in
nature but quais-TEM

5. Characteristics components of
Microstrip Lines
 Relative Permittivity
 Effective Dielectric

6.  Wavelength and Velocity Factor
 Characteristic Impedance

8. If w/h ratio tends to infinity then Relative permittivity
tends to relative permittivity and characteristic
impedance same as parallel plate lines have as

9. Website
 http://www1.sphere.ne.jp/i-
lab/ilab/tool/ms_line_e.htm