... described in
Section 10.1 is chosen as an initial design. The attenuation poles at the normalized
lowpass frequencies are also chosen as ⍀ = ±1.5 to meet the selectivity. The initial
values for ... Schematic circuit for the edge-coupled microstrip bandpass filter for CAD.
L4 = sin
–1
Ί
(9.39)
where
g
and Z
r
are the microstrip guided wavelength and the microstrip character-...
... 10
Advanced RF/ Microwave Filters
There have been increasing demands for advanced RF/ microwave filters other than
conventional Chebyshev filters in order to meet stringent requirements from RF/ mi-
crowave ... Characteristics
The filter having only one pair of transmission zeros (or attenuation poles) at finite
frequencies gives much improved skirt selectivity, making it a viable intermed...
... illustrates, where the top and
bottom of the cavity are the perfect electric walls and the remaining sides are the
perfect magnetic walls. The EM fields inside the cavity can be expanded in terms of
TM
z
mn0
modes:
E
z
= ... filter configuration.
11.5.1 Microstrip Dual-Mode Resonators
For our discussion, let us consider a microstrip square patch resonator represented
by a Wheeler’s cavity...
... spectrum is the visible optical spectrum,
the ultraviolet spectrum, and x-rays. Below the microwave frequency spectrum is
the radio frequency (RF) spectrum. The frequency boundary between RF and mi-
crowaves ... factors of filter
elements on filter performance are also discussed.
Chapter 4 summarizes basic concepts and design equations for microstrip lines,
coupled microstrip lines, an...
... building elements in many areas of RF/ microwave en-
gineering. Such networks are used to select/reject or separate/combine signals at
different frequencies in a host of RF/ microwave systems and equipment. ... chapter to describe various network concepts and provide
equations that are useful for the analysis of filter networks.
2.1 NETWORK VARIABLES
Most RF/ microwave filters and filter...
... here for easy reference.
4.1 MICROSTRIP LINES
4.1.1 Microstrip Structure
The general structure of a microstrip is illustrated in Figure 4.1. A conducting strip
(microstrip line) with a width ... section, some typical microstrip discontinuities and components that are of-
ten encountered in microstrip filter designs are described.
4.3.1 Microstrip Discontinuities
Microstrip dis...
... Y
n
denotes the sin-
gle microstrip characteristic impedance of the input/output resonator.
This type of microstrip bandpass filter is compact, but requires use of grounding
microstrip resonators, ... the microstrip is not a pure TEM transmission line.
For demonstration, we also let the microstrip resonators be
g0
/4 long and require
no capacitive loading for this filter design....