SAW Filter Material: LiNbO3, LiTaO3 & Quartz Wafers
If your RF front-end design needs to isolate a specific frequency band without drifting under temperature, the substrate material is the first decision to get right.
Substrate Choice Determines Whether Your Filter Actually Works in the Field
A SAW filter that performs well on the bench but drifts out of spec once it's operating in a hot base station enclosure, or one that can't hit your target bandwidth because the substrate's coupling coefficient is too low, isn't a design failure — it's usually a material selection problem. Every RF front-end has a specific combination of bandwidth, insertion loss, and temperature stability it needs, and the piezoelectric substrate is what sets the ceiling on all three.
Jingxin New Materials produces LiNbO3, LiTaO3, and synthetic quartz wafers at SAW-grade tolerances, in-house from crystal growth through polishing, at our ISO 9001:2015 / ISO 14001:2015 certified facility in Zhuji, Zhejiang.
so you're not forced into one
when bandwidth is the priority
for higher-volume runs
so quality claims are documented
Common SAW Filter Applications — and What Each One Needs
The right material depends less on "what's the best SAW material" and more on what your device actually has to survive.
Base Station Front-End
SAW filters selecting and isolating bands in telecom infrastructure.
Mobile Device RF Front-End
Compact SAW filters managing multiple bands in a small footprint.
Mobile RF Front-End Modules
The problem: Modern handsets pack dozens of frequency bands into a few millimeters of board space, so filters need to be small, low-loss, and cheap to produce at volume without letting adjacent bands bleed into each other.
Why it matters: A higher coupling coefficient (k²) supports wider bandwidth in a smaller device footprint — one reason LiNbO3 is widely used here.
Telecom Base Stations
The problem: Outdoor equipment runs continuously across wide temperature swings — a filter that drifts as the enclosure heats up during the day can degrade signal quality or trigger dropped connections.
Why it matters: Materials with a lower temperature coefficient (TCD) hold their center frequency more consistently across that swing.
RF Signal Processing & Test Equipment
The problem: Reference filters and signal-processing components in test/measurement gear need extremely predictable, repeatable behavior — inconsistent substrate quality shows up as calibration drift.
Why it matters: Wafer-to-wafer consistency in surface quality and orientation reduces variation between units.
General RF & Wireless Modules
The problem: Cost-sensitive, high-volume wireless modules (IoT, connectivity add-ons) need reliable filter performance without over-specifying an expensive substrate the design doesn't need.
Why it matters: Matching material to actual requirement — not defaulting to the priciest option — keeps unit cost down without sacrificing function.
Which Material Fits Your Design?
Full electromechanical data is on each product page.
Need the widest bandwidth
LiNbO3 has the highest electromechanical coupling of the three, supporting wider-bandwidth filter designs in a compact footprint — common in mobile RF front-ends.
View LiNbO3 Wafers →Need higher-frequency performance
LiTaO3 offers a still-strong coupling coefficient with different temperature behavior than LN, and is a common choice for high-frequency filter designs.
View LiTaO3 Wafers →Need frequency stability above all
Quartz trades coupling strength for an extremely low temperature coefficient — the right call when drift under temperature is the failure mode you're most worried about.
View Quartz Wafers →Not sure which applies to your design? Send us your target frequency and operating environment.
SAW Grade Material Data
Use this table as a starting reference when evaluating which material fits your design.
LiNbO3 leads on coupling/bandwidth; Quartz leads on temperature stability; LiTaO3 sits between the two, closer to LiNbO3.
| Parameter | SAW Grade LN | SAW Grade LT | SAW Grade Quartz |
|---|---|---|---|
| Coupling k² | 5.5% | 5.7% | Low |
| TCD | +75 ppm/°C | -35 ppm/°C | Extremely low |
| Main Cut | 128°Y / 64°Y | 42°Y / X112° | AT/BT/ST/SC/IT/CT/DT/GT |
Full specifications (diameter, thickness, surface quality, tolerances) are on each material's product page: LiNbO3 · LiTaO3 · Quartz.
What Actually Changes for You as the Buyer
Full in-house production, verifiable certification, and custom processing — these are the three things that affect your sourcing risk.
One Supplier, Start to Finish
Crystal growth, cutting, and polishing all happen at the same facility — so every wafer you receive carries a single, traceable quality record from ingot to finished substrate.
See the process →Specs You Can Verify
Production runs under an ISO 9001:2015 / ISO 14001:2015 certified system with inspection records kept at each stage, so you have documentation to check your wafers against.
View certifications →Built to Your Spec
If your device needs a cut orientation or thickness outside our standard list, tell us your requirement and we'll confirm what's feasible on our line.
View processing services →Frequently Asked Questions
My filter drifts out of spec at high temperature — is that a material issue?
Likely yes. If your current substrate has a high temperature coefficient, consider whether quartz or a different cut orientation would better hold frequency across your operating range.
I need to fit more bands into a smaller filter — which material helps?
LiNbO3's higher coupling coefficient generally supports wider bandwidth in a smaller footprint — see the decision guide above.
Can I request a cut orientation not listed here?
Contact us with your target frequency and device design — we'll confirm feasibility on our current line.
Do you supply quartz for both SAW devices and timing applications?
Yes — the same synthetic α-quartz material is used across both. See our Frequency Control & Timing page.
Will going with a lower-coupling material limit my design later?
It can, if bandwidth requirements grow. If there's a chance your design will need more bandwidth down the line, it's worth discussing headroom with us now rather than re-qualifying a new material mid-production.
Need SAW-Grade Wafers for Your Filter Design?
Tell us your target frequency, operating environment, and preferred material — we'll get back with a quote.