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Quarterwave CORP.

1500 Valley House Dr Ste 100, Rohnert Park, CA 94928

ACTIVELAST SEEN IN FEDERAL DATA OCT 2026 · 4 SOURCES

Operating signal within 12 months from two or more independent sources.

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Homepage of Quarterwave CORP.
Their homepage, crawled AUG 2026

What they make

Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing334220
  • traveling wave tube amplifiers
  • microwave amplifiers
  • high voltage power
  • power levels ranging
  • 10 watts
  • traveling wave tubes
  • modules
  • high power
  • wide bandwidth
  • TWTA
  • synthetic aperture radars
  • airborne weather research

NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026

Products

Sold by QUARTERWAVE CORP. · 2
Converters, Electrical, Nonrotating · Electrical And Electronic Properties Measuring And Testing Instruments

Recorded against the company rather than this address. Federal award and drug records name the company, not the plant, so we cannot say which of its sites makes these.

Where these came from
2 from usaspending_psc · Federal registry
Supplied under federal award 6973GH24C00072 (2024-06-04), PSC . An award shows what the government bought from this company; it does not establish which of its sites made it.

Where it is

38.32174, -122.67921 · CENSUS TIGER
COUNTY
METRO AREA
ON GOOGLE MAPS

Other plants nearby

FacilityCityIndustryStatusDistance
Ume Voice INCPetalumaOther Communications Equipment Manufacturing
334290
 LIKELY ACTIVE12.0 KM
Meinberg USA INCSanta RosaRadio and Television Broadcasting and Wireless Communications Equipment Manufacturing
334220
 ACTIVE13.2 KM
Sonoma Photonics, INCSanta RosaCommercial and Service Industry Machinery Manufacturing
333310
 REPORTED CLOSED12.4 KM
Agilent Technologies, INC.Santa RosaRadio and Television Broadcasting and Wireless Communications Equipment Manufacturing
334220
 LIKELY ACTIVE18.2 KM
Retzlaff INCSan RafaelOther Communications Equipment Manufacturing
334290
 ACTIVE36.2 KM

Every listed plant in Sonoma County

Also at this address

No other federal record shares this street address.

Where this record comes from

4 sources hold this plant, and 11 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

  • The company’s own websiteOPERATING
    first seen JUL 2026 · last seen OCT 2026
  • SAM.gov entity registrationOPERATING
    Record DJYSFKHFKPR5 · first seen MAY 2026 · last seen JUN 2026
  • DOL Form 5500 retirement plan filingsOPERATING
    Record 680138101|CA|94928|1500 valley house dr · first seen NOV 2024 · last seen NOV 2024
  • SBA Paycheck Protection Program loan recordsEXISTENCE
    Record CA|rohnert park|1500 valley house dr ste 100 · first seen JAN 2021 · last seen JAN 2021

IN SONOMA COUNTY9 other plants share this one’s industry (Communications Equipment Manufacturing, NAICS 3342); 1 of them has a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name
SAM.gov: QUARTERWAVE CORP. · MAY 2026
Street address
SAM.gov: 1500 VALLEY HOUSE DR STE 100 · MAY 2026
City
SAM.gov: ROHNERT PARK · MAY 2026
State
SAM.gov: CA · MAY 2026
Coordinates
Census geocoder: 38.321737533872,-122.679209103585 · JUL 2026
Employees (band)
SBA PPP: 20-99 · JAN 2021
Website
SAM.gov: http://www.quarterwave.com · MAY 2026
CAGE code
SAM.gov: 52557 · MAY 2026
Retirement plan filing (Form 5500)
DOL: 0 active participants, plan year ending 2024-11-30, 1 plan(s) · NOV 2024
PPP loan
SBA PPP: PPP loan x1, approved 2021-01-21, 22 jobs reported · JAN 2021
SAM registration expires
SAM.gov: 2027-05-13 · MAY 2026

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