# SBIR / STTR #DAF27BZ02-DV025

USAF Direct-to-Phase-II SBIR for continuously tunable notch filters

**Buyer:** United States Air Force
**Posted:** November 05, 2026
**Respond By:** January 06, 2027
**Identifier:** DAF27BZ02-DV025
**NAICS:** 541715, 334419

The U.S. Air Force is seeking Direct-to-Phase-II SBIR research and development proposals for compact, continuously tunable notch filters to protect wideband receivers.
- **Government buyer:** Department of the Air Force (USAF), under Air Force Materiel Command (AFMC); the opportunity is part of the Department of War’s SBIR program.
- **Topic:** DAF27BZ02-DV025, “Wide Pass Bandwidth, High Selectivity, Continuously Tunable Notch Filters.”
- **Requested technology:** Miniature, low-power filters for electronic warfare, signals intelligence, and electronic support measures receivers. Requirements include tuning across at least three of the L, S, C, and X bands; a 1–18 GHz passband; 1–12 GHz notch tuning; notch depth greater than 20 dB; notch bandwidth under 1%; insertion loss/noise figure no greater than 1.5 dB; and passband IIP3 above +50 dBm.
  - Each filter must be under 3 cc, use under 100 mW, and be connectable in series without interference between filters.
- **OEMs and vendors:** No manufacturers, OEMs, or vendors are identified in the notice or attachments.
- **Notable requirements:** ITAR/EAR export-control restrictions apply. The topic is Direct to Phase II; no Phase I award will be made. CMMC Level 2 (Self) is identified in the notice.

### Description

This DoW SBIR topic concerns wide-pass-bandwidth, high-selectivity, continuously tunable notch filters. It is a USAF Direct to Phase 2 topic under the 2027 SBIR Broad Agency Announcement, release 2. The topic is in pre-release status, with responses due February 7, 2027. The source provides no further technical scope or estimated contract value.

[View original listing](https://www.dodsbirsttr.mil/topics-app/)