折叠半模基片集成波导在滤波器和均衡器中的应用

王显; 张德伟; 王树兴; 吕大龙; 张毅

doi:10.11884/HPLPB201931.190134

折叠半模基片集成波导在滤波器和均衡器中的应用

doi: 10.11884/HPLPB201931.190134

中国人民解放军战略支援部队信息工程大学, 郑州 450001

基金项目:

核高基重大专项 2013ZX01010003-004

详细信息

作者简介:
王显(1994—), 男，硕士，主要从事微波电路方向的研究; 18595823270@163.com

中图分类号: TN715
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- 被引次数: 0
出版历程
- 收稿日期: 2019-04-28
- 修回日期: 2019-07-10
- 刊出日期: 2019-09-15

Characteristic analysis of folded HMSIW and implements in equalizers and filters

PLA Strategic Support Information Engineering University, Zhengzhou 450001, China

摘要

摘要: 提出了一种数学建模方法用来分析折叠半模基片集成波导(FHMSIW)结构的场分布。基于多线理论首次计算了FHMSIW结构的衰减常数和相位常数，验证其与传统波导和基片集成波导的等效性。提出了FHMSIW结构具有高通特性和带阻特性，同时该结构的上下层具有近似奇对称的性质。通过在FHMSIW结构的中间金属层蚀刻缝隙或者添加金属过孔，就可以实现器件由带通到带阻的性能转换，给出了FHMSIW结构带阻、带通特性的产生和变换机理。利用其独特的性质，分别设计了等效HMSIW四分之一谐振枝节加载的FHMSIW均衡器和FHMSIW带通滤波器，设计的FHMSIW均衡器无需附加额外的馈电机制。测量结果显示出器件具有良好的性能，与仿真结果具有很好的一致性。相比于其他的平面电路，该设计的结构具有小型化、低损耗以及高Q值等优势。
- 折叠半模基片集成波导 /
- 场分布 /
- 相位常数 /
- 均衡器 /
- 滤波器
Abstract: A mathematical method is proposed to calculate the field distribution theoretically of folded half mode substrate integrated waveguide(FHMSIW) for the first time. The phase constant is also given using an improved multi-line method, verifying its equivalence with conventional waveguide and substrate integrated waveguides. The FHMSIW transmission line properties of resonance effect, quasi-rotational symmetry of two PCB layers and high-pass feature are proposed. An FHMSIW equalizer loaded equivalent HMSIW resonant cavities, and an FHMSIW bandpass filter loaded folded quarter-wave FHMSIW resonators are designed. The two components share the same structure with a little difference. The model analysis, simulated results and measured results are all provided. The FHMSIW equalizer is achieved without increasing extra excitation structures. The measured results show a good performance and are in agreement with the simulated results. Compared with the other planar circuits, these structures have superiorities of small size, simple structure, low loss and high Q, suitable for the miniaturization development, and are easily integrated with other circuits.
- folded half mode substrate integrated waveguide /
- field distribution /
- phase constant /
- equalizers /
- filters

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图 1 FHMSIW结构图

Figure 1. Structure of FHMSIW

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图 2 FHMSIW结构的传输性能

Figure 2. Transmission performance of the FHMSIW

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图 3 FHMSIW结构数学模型

Figure 3. Mathematical model of the FHMSIW

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图 4 FHMSIW结构场分布

Figure 4. Field distribution of the FHMSIW

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图 5 n取不同值时的相位常数

Figure 5. Phase constant when n takes different values

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图 6 多种方法计算的FHMSIW相位常数β比较

Figure 6. FHMSIW phase constants calculated by various methods

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图 7 FHMSIW中三种情况下的衰减常数

Figure 7. Attenuation constants in three cases in FHMSIW

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图 8 FHMSIW均衡器结构图

Figure 8. Structure of FHMSIW equalizer

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图 9 FHMSIW均衡器测试曲线

Figure 9. Measured result of FHMSIW equalizer

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图 10 FHMSIW谐振器结构图

Figure 10. Structure of FHMSIW resonator

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图 11 FHMSIW带通滤波器结构

Figure 11. Structure of FHMSIW bandpass filter

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图 12 FHMSIW带通滤波器测试曲线

Figure 12. Measured result of FHMSIW filter

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图 13 FHMSIW结构图

Figure 13. Structure of FHMSIW

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表 1 FHMSIW均衡器尺寸表

Table 1. Dimensions of FHMSIW equalizer

W_L/mm	h/mm	W_FHMSIW/mm	W_HMSIW/mm	L_HMSIW2/mm
7.00	0.50	6.63	3.21	13.00

ΔW/mm	D/mm	b/mm	L_HMSIW1/mm	L_FHMSIW/mm
0.375	0.40	0.80	12.00	25.00

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表 2 FHMSIW滤波器尺寸表

Table 2. Dimensions of FHMSIW filter

W_L/mm	L_slot1/mm	W_FHMSIW/mm	L_slot2/mm	L_slot3/mm
5.25	2.93	4.85	5.10	2.93

ΔW/mm	D/mm	b/mm	W_slot/mm	L_FHMSIW/mm
0.38	0.40	0.80	0.63	11.60

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表 3 滤波器指标对比

Table 3. Performance comparison with previous reported SIW filters

source of filter	frequency/GHz	bandwidth	insertion loss and return loss/dB	size(λ_g×λ_g)
Ref.[17]	14.5	4.84%	2.6/16	1.01×1.01
Ref.[18]	11.4	3.06%	no/12	no
Ref.[19]	8.5	42%	1.1/11	1.25×0.63
Ref.[20]	5	11.3%	1.85/16.5	0.73×0.71
this work	7.1	38%	0.8/15	0.90×0.35
Note: λ_g is waveguide wavelength at center frequency.

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