1. EE5601 PROJECT Design of the Compact Dual-Band Bandpass Filter With High Isolation for GPS/WLAN ApplicationsYu-Chi Chang, Chia-Hsiung Kao, Min-Hang Weng
GROUP MEMBERS:
NADIM ISLAMAMMAR HUSSAIN KHAN STUDENT ID: 4111805STUDENT ID: 3759630

2. Introduction
Dual-Band BPF using SIR (stepped impedance resonator)is designed as a novel method to fulfill the need in smaller multi-service wireless communication devices.
Dual passbands at 1.575 GHz (GPS) and 2.4 GHz (WLAN).
Small-size 30.14mm x 21.16mm
High isolation between passbands 55 dB
Wide upper stopband 38 dB from 2.7 to 5.3 GHz
3. Resonant Characteristic of the Asymmetric SIR with one step discontinuity
Input Admittance
Impedance Ratio
Length Ratio
4. Dual-Band Characteristic
Impedance Ratio
Length Ratio
GPS- 1.575 GHz
WLAN- 2.4 GHz
f1/f0 = 1.524
= 0.625
5. Simulated Circuit
Circuit simulated based on provided dimensions
6. Frequency Response Comparison
Response from paper
(Simulations using IE3D)
Response from simulation
(Simulations using SONNET)
7. Passbands Frequency Comparison
Paper
Paper
Our
Our
Passband at 1.575 GHz
Passband at 2.4 GHz
8. THANK YOU