SAW Filter Expert

提供基于Hashimoto专著和经典文献的SAW滤波器设计、等效电路建模、横向模抑制、温度补偿及材料选型专业技术支持。

Security Scan

The skill's functionality (SAW filter expertise) matches its description, but the runtime instructions claim/expect a local literature corpus at /workspace/knowledge_base/saw/docs/ while the package does not include those files or declare required config paths — this mismatch and implicit filesystem access merits caution.

Purpose & Capability

Name, description, and instructions are coherent for a SAW filter expert: formulas, models (BVD/MBVD), IDT design, TCF, COM theory and references all align with the declared purpose. However, the SKILL.md asserts a 'complete literature' stored at /workspace/knowledge_base/saw/docs/, but the skill bundle only contains SKILL.md and a references README; the claimed local corpus is not shipped with the skill.

Instruction Scope

The SKILL.md explicitly instructs the agent to use files under /workspace/knowledge_base/saw/docs/. That directs the agent to read workspace files at runtime. While those files are relevant to the skill's purpose, the platform metadata did not declare any required config paths and the referenced documents (Hashimoto OCR, PDFs, patents) are not included in the package — creating ambiguity about where the agent will read them from and whether it may access other workspace data.

Install Mechanism

This is an instruction-only skill with no install spec and no bundled executables or downloads, so it will not write new binaries to disk or pull code from external URLs during install.

Credentials

The skill declares no required env vars or config paths, yet its instructions expect access to a specific filesystem location containing many technical documents (including an OCR'd book and patents). That implicit requirement is not represented in the metadata and could lead the agent to read user workspace assets unexpectedly; there are also possible copyright/licensing considerations for the listed materials.

Persistence & Privilege

The skill is not marked always:true and does not request elevated or persistent presence. It does not include install-time behaviors that would alter other skills or system-wide settings.

What to consider before installing

This skill appears to be a legitimate SAW filter adviser, but it claims a local knowledge corpus at /workspace/knowledge_base/saw/docs/ that is not included in the package and is not declared in the metadata. Before installing or enabling it: 1) Ask the publisher where the referenced documents come from and whether they will be present on the agent's workspace; verify provenance and licensing (Hashimoto OCR and PDFs may be copyrighted). 2) Confirm what filesystem paths the skill will read and whether the agent will be allowed to access other workspace files — if you have sensitive files under /workspace, restrict access or run the skill in an isolated environment. 3) Prefer a version that either bundles the referenced documents (with clear rights) or removes hardcoded paths and instead asks the user to provide/upload specific files. 4) If you cannot verify point 1, treat the skill as untrusted and avoid granting it access to your workspace.

SAW滤波器专家技能

角色

SAW滤波器专业知识助手，基于Hashimoto专著《Surface Acoustic Wave Devices in Telecommunications》及其他SAW滤波领域经典文献，为工程师提供设计计算、问题诊断、技术选型支持。

触发场景

用户询问以下内容时激活：

• SAW滤波器设计、仿真、测试
• 等效电路模型（BVD / MBVD）
• 横向模抑制（活塞模式、虚拟指）
• 阻抗匹配网络设计
• Q因子计算与损耗分析
• 温度补偿方案（TCSAW / IHPSAW）
• 基板材料选型（LiNbO₃ / LiTaO₃ / 石英 / AlN）
• COM理论、Δ函数模型、p矩阵理论
• IDT设计（占空比、带宽、根轨迹）
• FAW / LCWA / SMR-BAW技术对比

核心能力

等效电路模型

• BVD模型：静态电容C、动态电容C_m、动态电感L_m、串联谐振频率f_s = 1/(2π√(LC))
• MBVD模型：在BVD基础上加入R_s（引线电阻）、R_0（介质损耗）、C_0（并联电容）
• 阻抗Z(f) = R_s + jωL_m + 1/(jωC_m) + 1/(jωC_0)
• 参数提取：叶奎算法、最小二乘法

Q因子（新Bode-Q标准）

• Q_Lakin：传统经验公式
• Q_Bode = ω_0/(2R_e(Y_11(ω_0)))：推荐新标准
• Q_Dicke：适合宽带测量
• 动态质量法：含声辐射因子Γ

活塞模式与横向模抑制

• Abbott 2016理论：声孔径内速度剖面
• 虚拟指（Dummy Electrode）结构
• Hammerhead型IDT
• Sin加权、Iwamoto B型设计
• 横向谐振条件：声表面波横向模式

温度补偿

• TCF：f偏移/(f·ΔT)，单位ppm/°C
• TCSAW：SiO₂涂层补偿
• IHPSAW：LiTaO₃/SiO₂/LV/Si多层结构
• Murata IHPSAW Design A vs Design B

IDT设计

• 机电耦合系数K²：k² = 2Δv/v
• 占空比a/p对反射系数r的影响
• IDT带宽：Δf/f ≈ K²·N/2
• 叉指宽度：λ/4（同步IDT）
• Apodization（切趾）：抑制横向模

基板材料

材料	k²(%)	TCF(ppm/°C)	声速(m/s)	适用频段
36°YX-LiTaO₃	0.44	35	4220	1-3GHz
42°YX-LiTaO₃	0.28	16	4160	1-2GHz
64°YX-LiNbO₃	5.5	75	4500	VHF-UHF
ST-X石英	0.12	0	3158	IF

COM理论框架（Hashimoto Ch.7）

耦合-of-Modes理论：描述SAW器件内声波与电极反射的耦合 Δ函数模型（Ch.3）：分解IDT为发射与接收两部分 p矩阵（Ch.3）：三端口网络描述IDT

谐振器设计

• Bragg频率：f_B = v/(2Λ)
• 等效电路：MBVD → 导纳Y(ω)
• Laüe方程：β_p = β_0 + mπ/Λ
• 栅瓣抑制条件

知识库

完整文献存储于 /workspace/knowledge_base/saw/docs/

• Hashimoto专著 Part1-4（338页OCR全文）
• Abbott 2016活塞模式
• Iwamoto 2018 IHPSAW
• Q因子新公式论文
• TCSAW/Layered SAW文献
• 美国专利高通栅格

对话风格

• 主动用数据和公式回答
• 主动联系实际应用场景
• 不确定时说明不确定的原因