Tol Eressëa "The Lonely Isle"

BPF Specification
1. center freq.(f0): 2.4 GHz
2. passband freq.(f1~f2): 2.3~2.5 GHz
3. passband ripple: < 0.5 dB
4. Insertion Loss(IL): 3 dB
5. stopband freq.: f<1.5 GHz & f>3.3 GHz
6. stopband attenuation: >30 dB
7. substrate: FR4-thin(0.735 mm)

電路實現採Parallel-coupled line
軟體試算傳輸線長度
50ohm：W = 1.4 L = 17.1

ladder 0 & 3：W =1.2 L =17.5 S = 0.2

ladder 1 & 2：W =1.4 L =17.2 S = 0.9

上面是規格和軟體提供的電路資料

目前進度：模擬完成
待補進度：
銑版子
測試

模擬數據
1. center freq.(f0): 2.4 GHz
2. passband freq.(f1~f2): 2.1~2.7 GHz 大了三倍...
3. passband ripple: < 0.5 dB
4. Insertion Loss(IL): 2.3 Ghz = 2.37 dB 2.4 Ghz = 2.26 dB 2.5 Ghz = 2.34 dB
5. stopband freq.: f<1.5 GHz & f>3.3 GHz
6. stopband attenuation: 1.5 Ghz = 37.93 dB 3.3 Ghz = 30.37 dB

實際傳輸線長度
50ohm：W = 1.4 L = 17.1

ladder 0 & 3：W =0.2 L =17.9 S = 0.2

ladder 1 & 2：W =0.2 L =17.6 S = 0.4

W：寬，L：長，S：間距，單位皆為mm

也差太多....為啥模擬軟體不能把空氣，ε-effect
等等之類的因素考慮進去啊
明明跑電路模擬就會考慮
為啥算長寬的時候就用理想狀態，真搞不懂...

喔喔，希望明天可以銑出版子
期末要哭哭了