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ECE 6345
Spring 2011
Homework 7
A rectangular patch is on a substrate with a relative permittivity r = 2.2 and a thickness of
0.1524 cm (corresponding to 60 mils). The width to length ratio is W / L = 1.5. The length of the
patch is L = 6.255 cm (this giv
ECE 6345
Spring 2011
Prof. David R. Jackson
ECE Dept.
Notes 4
1
Overview
This set of notes discusses the probe inductance of a
coax-fed patch.
Introduce probe model for a parallel-plate waveguide
Use this model to calculate the probe inductance
2
Probe In
ECE 6345
Spring 2011
Homework 5
1) A rectangular microstrip antenna is printed on a lossless substrate having a substrate relative
permittivity r = 2.2. The aspect ratio of the patch is W / L = 1.5 . The antenna is operated at
the resonant frequency (assu
ECE 6345
Spring 2011
Homework 4
A rectangular microstrip antenna is printed on a substrate having h = 0.1524 [cm] (unless stated
otherwise below) and r = 2.2. The substrate may be assumed to be lossless (and nonmagnetic).
The antenna is resonant at 1.575
ECE 6345
Spring 2011
Homework 1
1) Use the method of separation of variables to show that the electric field inside a rectangular
patch resonator that has PMC walls on the sides has the form
m x
n y
Ez ( x, y ) = cos
cos
,
L
W
where
2
2
m n
k
ECE 6345
Spring 2011
Homework 6
1) A dielectric slab has a relative permittivity r 2.2 . Plot the normalized wavenumber of the
TM0 surface-wave mode, TM 0 / k0 , versus the normalized thickness of the slab, h / 0 . Plot
up to a maximum of h / 0 0.1 . On t
ECE 6345
Spring 2011
Homework 3
1) A nearly-square microstrip antenna fed on the diagonal is designed to obtain RHCP at 1.575
GHz. The patch is printed on a substrate with thickness h = 0.1524 cm and r =2.2. When a
square antenna (also resonant at 1.575 G
ECE 6345
Spring 2011
Prof. David R. Jackson
ECE Dept.
Notes 3
1
Overview
This set of notes discusses the Q of a patch, and its different
components, as well as the radiation efficiency of the patch.
Defining Q and its components: Qd, Qc, Qsp, Qsw
Calculat
ECE 6345
Spring 2011
Prof. David R. Jackson
ECE Dept.
Notes 2
otes
1
Overview
This set of notes treats circular polarization, obtained by
using a single feed.
L W
y
y0 = x0
W
(x0, y0)
x
L
2
Overview
Goals:
Find the optimum dimensions of the CP patch
Find
ECE 6345
Spring 2011
Homework 2
1) A certain probe-fed microstrip antenna has a resistance of 50 [] at resonance. The
bandwidth (defined by SWR < 2) is 2%. The resonance frequency is 2.0 GHz. Assume that
the probe inductance is negligible.
a) Plot the inp