rfckt.lcbandpasstee

Bandpass tee filter

Description

Use the rfckt.lcbandpasstee object to create a bandpass tee filter as a network of inductors and capacitors as shown in this figure.

In the diagram, [L₁, L₂, L₃, L₄, ...] is the value of the 'L' object property, and [C₁, C₂, C₃, C₄, ...] is the value of the 'C' object property.

Note

lcladder is recommended over rfckt.lcbandpasstee because it enables you to:

• Create a two-port bandpass tee filter.

• Build a circuit object with a bandpass tee filter.

• Convert an rffilter object to an LC ladder filter.

• Model a two-port bandpass tee filter element in an RF chain created using an rfbudget object or the RF Budget Analyzer app, and then export this element to RF Blockset™ or to rfsystem System object™ for circuit envelope analysis.

(since R2023b)

Creation

Syntax

h = rfckt.lcbandpasstee

h = rfckt.lcbandpasstee('Property1',value1,'Property2',value2,...)

Description

h = rfckt.lcbandpassteereturns an LC bandpass tee network object whose properties all have their default values.

h = rfckt.lcbandpasstee('Property1',value1,'Property2',value2,...) sets properties using one or more name-value pairs. You can specify multiple name-value pairs. Enclose each property name in a quote

Properties

'AnalyzedResult' — Computed S-parameters, noise figure, OIP3, and group delay values

rfdata.data object

Computed S-parameters, noise figure, OIP3, and group delay values, specified as rfdata.data object. The values are computed over the specified frequency range. By default, this property is empty.

Data Types: function_handle

'C' — Capacitance value

positive vector in farads

Capacitance value from source to load of all capacitors in the network, specified as a positive vector in farads. The length of the capacitance vector must be equal to the length of the vector you provide for 'L'. The default value is [0.0186e-10, 0.1716e-10, 0.0186e-10].

Data Types: double

'L' — Inductance value

positive vector in henries

Inductance value from source to load of all inductors in the network, specified as a positive vector in henries. The length of the inductance vector must be equal to the length of the vector you provide for 'C'. The default value is [0.2781e-7, 0.0301e-7, 0.2781e-7].

Data Types: double

'Name' — Object name

'LC Bandpass Tee' (default) | 1-by-N character array

Object name, specified as a 1-by-N character array. This is a read-only property.

Data Types: char

'nport' — Number of ports

positive integer

Number of ports, specified as a positive integer. This is a read-only property. The default value is 2.

Data Types: double

Object Functions

analyze	Analyze RFCKT object in frequency domain
calculate	Calculate specified parameters for rfckt objects or rfdata objects
circle	Draw circles on Smith Chart
extract	Extract specified network parameters from rfckt object or data object
listformat	List valid formats for specified circuit object parameter
listparam	List valid parameters for specified circuit object
loglog	Plot specified circuit object parameters using log-log scale
plot	Plot circuit object parameters on X-Y plane
plotyy	Plot parameters of RF circuit or RF data on xy-plane with two Y-axes
getop	Display operating conditions
polar	Plot specified object parameters on polar coordinates
semilogx	Plot RF circuit object parameters using log scale for x-axis
semilogy	Plot RF circuit object parameters using log scale for y-axis
smith	Plot circuit object parameters on Smith Chart
write	Write RF data from circuit or data object to file
getz0	Calculate characteristic impedance of RFCKT transmission line object
read	Read RF data from file to new or existing circuit or data object
restore	Restore data to original frequencies
getop	Display operating conditions
groupdelay	Group delay of S-parameter object or RF filter object or RF Toolbox circuit object

Examples

LC Bandpass Tee Filter

Create a LC Bandpass Tee Filter using rfckt.lcbandpasstee.

filter = rfckt.lcbandpasstee('C',[1e-12 4e-12],'L',[2e-9 2.5e-9])

filter = 
   rfckt.lcbandpasstee with properties:

                 L: [2x1 double]
                 C: [2x1 double]
             nPort: 2
    AnalyzedResult: []
              Name: 'LC Bandpass Tee'

References

[1] Ludwig, R. and P. Bretchko, RF Circuit Design: Theory and Applications, Prentice-Hall, 2000.

[2] Zverev, A.I., Handbook of Filter Synthesis, John Wiley & Sons, 1967.

Version History

Introduced before R2006a