A 5.8 GHz band pass filter for a drone link in Denmark is a narrower choice than the catalogue suggests: of 25 Walsin Technology (Walsin) RF filters in the 5 GHz region, 19 are band pass, only 14 of those reach 5,875 MHz, and none of the 235 filters is on our Hong Kong shelf.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this from Walsin’s RF filter export (Walsin_Filter.xlsx, 235 parts), the antenna export (Walsin_Antenna_ALL.xlsx, 44 parts) and our stock list as at 23 September 2026. It is for an RF or hardware engineer at a drone, robotics or ground-station company around Odense. Every part number is real and every count was re-measured by us on 11 November 2026. News statements name their source and the date we fetched them.
What did TEKEVER and EIFO announce for Odense?
A first Nordic base for a European drone maker, with Danish state investment. Tech.eu reported on 6 November 2026 that Denmark’s Export and Investment Fund, EIFO, joined TEKEVER’s 580 million US dollar Series D, and that TEKEVER is expanding into Odense, its first operational presence in the Nordic region.
The report says the Odense build-up will be phased according to demand and approvals, that TEKEVER is setting up a Danish entity, and that Odense was chosen for its drone and robotics base, including Odense Robotics, UAS Denmark’s test centre and the SDU Drone Centre. It gives no size, headcount or production figure. Those are the report’s statements, not ours. We have no relationship with TEKEVER or EIFO and say nothing about their designs or purchasing.
Which radio bands does a drone or ground-station board usually filter?
Typically a 2.4 GHz control link, a 5 GHz-band video or data link, and satellite navigation near 1,575 MHz, though every product is different. For this post we assume a 5.8 GHz link spanning 5,725 to 5,875 MHz, a 2.4 GHz link spanning 2,400 to 2,483.5 MHz and a GNSS input covering 1,559 to 1,606 MHz; these are our working assumptions, not TEKEVER’s.
The filter’s job is to keep the transmitter’s harmonics and the neighbouring band out of the receiver. If its passband stops short of the channel you use, the top channels pay insertion loss you did not budget for. Our posts on choosing an RF chip filter by band and choosing a 2.4 GHz chip antenna cover the selection method.
How many Walsin 5.8 GHz band pass filters cover the whole band?
Fourteen, if the band runs to 5,875 MHz. We parsed the Frequency field of all 235 filters and found 25 whose passband reaches into the 5,725 MHz region: 19 band pass, 4 low pass, 1 high pass and 1 balanced. 22 of the 25 reach 5,850 MHz, 18 reach 5,875 MHz, and only 14 of those 18 are band pass.
| Band (our assumption) | Walsin filters that span it | Of which band pass | Sizes present | On shelf 23 Sep 2026 |
|---|---|---|---|---|
| 5,725 to 5,850 MHz | 22 | 18 | 1608, 2012, 2520 | 0 |
| 5,725 to 5,875 MHz | 18 | 14 | 1608, 2012 | 0 |
| 2,400 to 2,483.5 MHz | 128 | 71 | 1005 to 2520, seven sizes | 0 |
| 1,559 to 1,606 MHz (GNSS) | 19 | 6 | 1005 to 3225 | 0 |
Three of the 25 stop short of 5,850 MHz: RFBPF1608060K2T and RFHPF0605040K0T at 5,840 MHz and the balanced RFBPB2012090K2T at 5,100 MHz. Four more stop exactly at 5,850 MHz. On GNSS, only one part is a dedicated band pass for the navigation band, RFBPF1411070E0T at 1,558 to 1,606 MHz; the other five band pass parts are wideband at 1,125 to 1,675 MHz. We have not seen these counts published elsewhere.
Which Walsin RF parts answer a 5,725 to 5,875 MHz brief, and what differs?
Several 1608 and 2012 band pass parts do, with insertion loss from 0.6 to 2.2 dB in the export. For a 5,725 to 5,875 MHz band pass brief, RFBPF1608060K9T (5,150 to 5,950 MHz, 0.6 dB) and RFBPF2012090KCT (4,900 to 5,920 MHz, 1.5 dB) span it, while RFBPF2012100K6T stops at 5,850 MHz.
| Walsin part | Type / size | Passband in export | Insertion loss in export | Match / mismatch with the 5,725 to 5,875 MHz band pass brief | Your incumbent |
|---|---|---|---|---|---|
RFBPF1608060K9T |
Band pass, 1608 | 5,150 to 5,950 MHz | 0.6 dB | Match on band and type | |
RFBPF1608060KFT |
Band pass, 1608 | 4,900 to 5,950 MHz | 0.85 dB | Match; wider lower edge | |
RFBPF2012090KCT |
Band pass, 2012 | 4,900 to 5,920 MHz | 1.5 dB | Match; larger footprint | |
RFBPF2012100K6T |
Band pass, 2012 | 5,150 to 5,850 MHz | 1.6 dB | Mismatch: stops 25 MHz short | |
RFBPF1608060K2T |
Band pass, 1608 | 4,900 to 5,840 MHz | 1.5 dB | Mismatch: stops 35 MHz short | |
RFANT6050110L0T |
Chip antenna | 2.4 to 2.5 and 4.9 to 5.9 GHz | 4 dBi peak gain | Antenna, not a filter; match on both bands |
Attenuation is written differently on almost every row, so compare the stopband you need against Walsin’s datasheet rather than the export cell. A match is a match on the export fields only. Confirm against both datasheets and test in your own RF layout.
What do the Walsin RF exports get wrong for a Danish buyer?
Spelling, mostly, and it hides parts from a search. We counted the 128 filters that pass 2,400 to 2,483.5 MHz and found their Frequency field written 16 different ways; in the antenna export, 3 of 44 parts state their band only as “5.x GHz”, with no edge at all.
The filter type is also spelled two ways, “Band Pass Filter” with a double space on 110 parts and “Band Pass Filter” on 2, which we have published before. A text search for one spelling misses the other. We hold no Walsin datasheet for RF filters or antennas among our 28 datasheet files, so every passband here is the export’s field. None of the 235 filters or 44 antennas is on our shelf.
How can Venatech help a Danish drone and robotics team?
How Venatech helps: the 235 filters and 44 antennas above are to-order lines we can quote. The cross-reference tool, VenaMatch, decodes 18 manufacturers’ part numbers across 800,000+ crossable parts and accepts up to 500 part numbers or an Excel or CSV file; for RF parts, send us the band and footprint and we will search the export by edge, not by spelling.
Upload a radio BOM at BOM upload to request a quote. The ready-stock list is a Hong Kong snapshot dated 23 September 2026; the RF range lists the families. Walsin is the only line we are authorised for; Stackpole and Viking are lines we supply. We serve from Hong Kong in small lots, give no price, lead time or stock guarantee, hold no office or stock in Denmark, and give no export-control or compliance advice: confirm with your compliance team.
The short version
TEKEVER’s Odense expansion adds to a Danish drone cluster that needs 2.4 GHz, 5 GHz-band and GNSS front ends. Walsin lists 235 filters; 18 span 5,725 to 5,875 MHz and only 14 of those are band pass, one part is a dedicated GNSS band pass, and none is on our shelf. Search by band edge, not by the text in the Frequency field.
Send us your link bands and footprint and we will return the Walsin filters and antennas whose passband actually covers them, with every difference stated. Where does your top channel sit: 5,850 or 5,875 MHz?
Sources
Fetched 11 November 2026.
- Tech.eu, “Denmark’s EIFO joins TEKEVER’s Series D as company expands into Odense”, 6 November 2026: https://tech.eu/2026/11/06/denmarks-eifo-joins-tekevers-580m-series-d-as-company-expands-into-odense/
Related reading
- Choosing an RF chip filter by band
- Choosing a 2.4 GHz chip antenna
- Walsin RF balun, filter, coupler and multiplexer
- Free tools: VenaMatch cross reference and the ready stock list
Last reviewed 11 Nov 2026.
Frequently asked questions
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What did TEKEVER announce for Odense, Denmark?
Tech.eu reported on 6 November 2026 that TEKEVER is expanding into Odense, its first Nordic operational presence, with a Danish entity and a phased build-up, and that Denmark’s EIFO joined its Series D. No size or headcount was given.
How many Walsin 5.8 GHz band pass filters cover 5,725 to 5,875 MHz?
We counted 14 band pass filters, in 1608 and 2012, out of 18 filters of all types that span 5,725 to 5,875 MHz. Four more band pass parts stop at exactly 5,850 MHz. The band edges are our assumption; confirm yours.
Does Walsin make a dedicated GNSS band pass filter?
The export lists one dedicated part, RFBPF1411070E0T, at 1,558 to 1,606 MHz in a 1411 package. Five other band pass parts cover the band as wideband filters at 1,125 to 1,675 MHz.
How many Walsin filters pass the 2.4 GHz band?
128 of 235 pass 2,400 to 2,483.5 MHz, across seven sizes from 1005 to 2520, and 71 of them are band pass parts. Their frequency field is written 16 different ways, so search by edge, not by text.
Are any Walsin RF filters or antennas on your shelf?
No. None of the 235 filters or 44 antennas is on our Hong Kong list as at 23 September 2026. They are to-order enquiries, and we give no price, lead time or stock guarantee.
Do you give export-control or compliance advice for drone electronics?
No. This is engineering perspective only. We hold no office or stock in Denmark and give no legal, customs, export-control or radio-approval advice. Confirm with your compliance team.