| 摘要: |
| 为了快速准确地设计并制作恒带宽窄带集总跳频滤波器，提出了一种随频率变化而
变化的负载结构。通过对这种结构模型的分析，得到了其关于频率和相对带宽的精确变换公
式，利用麦夸特优化法对其进行优化计算，快速得到该负载结构各部件的最优值。最后利用
该方法设计并制作了一个二阶集总带通滤波器。实验结果表明，该方法实现滤波器比传统
手调快几倍，该滤波器在跳频范围30～90 MHz内保持相对恒带宽598%～689%，回波
损耗小于-19 dB，插损大于-2.2 dB。 |
| 关键词: 相对恒带宽 窄带集总跳频滤波器 负载结构 麦夸特优化法 |
| DOI： |
|
| 基金项目: |
|
| Theoretical Calculation and Implementation of a Lumped Constant Bandwidth Frequency hopping Narrowband Filter |
| ZHOU Chang,TANG Qing-hua,ZHAN La-min |
| (Institute of Microwave Technology and Application,Department of Electronics,
Huazhong University of Science and Technology,Wuhan 430074，China) |
| Abstract: |
| For fast and accurate design and production of lumped constant bandwid
th frequency-hopping(FH) narrowband filter, a load structure changing with frequ
ency
is introduced.Through analysis of this model, the exact frequency
and relative bandwidth transformation formula is derived.With Levenberg-Marqua
rdt method
the optimal values of the components in the load structure are obtained quickly
.Finally,by using
the method a 2-order lumped band-pass filter(BPF) is designed and developed.The
test res
ults show that the realization of the filter is several times faster than that o
f tradition
al manually-tuned filter,and over the 30～90 MHz hopping range,
the filter maintains a relatively constant bandwidth of 5.98%～6.89%, return lo
ss＜-19 dB, insertion loss＞-2.2 dB. |
| Key words: lumped constant bandwidth frequency-hopping narrowband filter load structure Levenberg-Marquardt method |
《电讯技术》编辑部 