Articles » Filter Design » 1 GHz Hairpin Bandpass Filter Design

1 GHz Hairpin Bandpass Filter Design

filter design rf filter bandpass filter rf components simulation

This article explains the design of a 1GHz Hairpin type Band Pass Filter (BPF). You can use RF design software tools like Agilent ADS or Microwave Office to simulate and verify the results. The layout is created automatically.

RF Simulation Circuit

1GHz Hairpin BPF design circuit

The figure above depicts the RF simulation circuit for a 1GHz Hairpin BPF.

Substrate Specifications

The following table outlines the substrate specifications used in the design:

Substrate SpecificationsValue
Relative Dielectric Constant (εr)3.38
Substrate Thickness (H)0.8128 mm
Conductor Thickness (T)0.035 mm
Rho (Metal Bulk resistivity normalized to gold)0.7
Tand (Loss tangent of dielectric)0.0027

Results

1GHz Hairpin BPF results

As shown in the figure, S21 (insertion loss) is about 0 dB. At an RF frequency of 1GHz, the insertion loss of the BPF (Band Pass Filter) is approximately -2dB. The return loss of this filter (S11) is around -17dB.

Layout Schematic

1GHz Hairpin BPF layout

Conclusion

As explained, any other RF filter of hairpin or interdigital type can be designed and simulated using this approach.