All 33 filters in Walsin’s RF export whose range contains 868 MHz are low-pass filters; none of the 112 band-pass filters does. 82 of 457 RF parts contain both 868 and 915 MHz, mostly cellular, and one metal antenna covers 863 to 928 MHz. None is on our Hong Kong list.
Venatech Limited, an authorised Walsin distributor in Hong Kong, holds the Walsin Technology (Walsin) RF and antenna exports: 457 RF part numbers in 8 families and 44 antenna rows. This post is for a procurement or design engineer at an Indian smart-meter or IoT module maker with a sub-GHz radio line to second-source. Every Walsin part number below is real and every count is ours. Where it states a development, it names the source, the document date and the day we fetched it, 2 November 2026.
What did the Jal Jeevan Mission and LoRa Alliance pages report?
Water metering is a live subject in India. EverythingAboutWater reported on 18 May 2026 that the Jal Jeevan Mission was extended to December 2028 with over 81.5 percent of rural households holding tap connections as of early February 2026, and a LoRa Alliance blog dated 19 August 2026 described LoRaWAN water meters on the licence-free 868 and 915 MHz bands.
For a buyer, that is context and nothing more. A mission extension is not a component order, neither page names a filter, antenna or supplier, and we draw no conclusion about which RF parts any Indian company buys. We have no relationship with either publisher or any meter vendor.
| Point | What the source says | Source date | Match / mismatch |
|---|---|---|---|
| Mission extension | Jal Jeevan Mission extended to December 2028; over 81.5 percent of rural households with tap connections as of early February 2026 | EverythingAboutWater, 18 May 2026 | Match for context only; no meter or part named |
| Radio band | A LoRaWAN ultrasonic water meter supports the licence-free 868 and 915 MHz bands | LoRa Alliance blog, 19 August 2026 | Match on the bands; mismatch with India’s own rules, which the page does not state |
| Deployments | One vendor dashboard: 30,853 meters under management across 61 projects; Delhi Jal Board has about 4 million water meters in place | LoRa Alliance blog, 19 August 2026 | Mismatch: vendor-presented; the page does not say how many meters use LoRaWAN |
| Components | The page names no capacitor, filter, antenna or supplier | LoRa Alliance blog, 19 August 2026 | Mismatch with any claim about passives |
How did we test Walsin’s RF parts at 868 and 915 MHz?
By containment of the two frequencies in a printed range. We parsed the Frequency column, or Frequency 1 to Frequency 3 on multiplexers, in all 457 rows of the Walsin RF export files and found 87 parts whose range contains 868 MHz and 82 whose range contains both 868 and 915 MHz. We then read the stock list as at 23 September 2026 against all 457 codes and found none.
That count sounds large and is not. The 82 are cellular-band parts: 9 antenna switches, 13 couplers, 8 baluns, 31 filters and 21 multiplexers whose ranges are mostly 698 to 960 MHz or wider. Across all 87 parts that contain 868 MHz, only 12 have a range of 100 MHz or less. A sub-GHz IoT radio needs the part that selects its band, which is a different thing from a part that merely spans it. Our post on choosing an RF chip filter by band covers the method.
Why are all 33 filters that contain 868 MHz low-pass?
Because the export’s only sub-GHz filters are cellular harmonic filters. We grouped the 235 filters by the Filter Type column: 94 are low-pass, 112 are band-pass, 3 are high-pass and 26 are balanced, and 33 low-pass filters contain 868 MHz while no band-pass, high-pass or balanced filter does. Every one of the 112 band-pass filters starts at 475 MHz or above, and 74 are labelled 2.4 GHz Bluetooth, Wi-Fi or Zigbee.
| Filter type in the export | Filters | Contain 868 MHz | Contain 868 and 915 MHz | Match / mismatch for a 868/915 MHz sub-GHz radio |
|---|---|---|---|---|
| Band Pass Filter | 112 | 0 | 0 | Mismatch: none selects the band |
| Low Pass Filter | 94 | 33 | 31 | Match on range for 33; but low-pass filters suppress what lies above the pass band, they do not select it |
| High Pass Filter | 3 | 0 | 0 | Mismatch: none selects the band |
| Balanced Filter | 26 | 0 | 0 | Mismatch: none selects the band |
A low-pass filter passes everything below its corner and rejects what is above; it cleans a transmitter’s harmonics but does not stop an out-of-band signal arriving at the receiver below the corner. We have not seen this counted against a LoRa band anywhere. The Filter Type column spells one type two ways, Band Pass Filter with a double space on 110 parts and Band Pass Filter on 2, so a plain text search finds only part of it.
Which worked parts show the match and the gaps?
Four, and none is a band-pass filter. RFLPF20120G9D3T is the only filter labelled IoT whose range contains 868 MHz (858 to 878 MHz) and its attenuation windows, 30 dB at 1716 to 1756 MHz and 40 dB at 2574 to 2634 MHz, sit at twice and three times 868 MHz on our arithmetic. The table lists it with the broader parts and the one antenna.
| Walsin part | Family, size | Range and type in export | Match / mismatch | Your incumbent |
|---|---|---|---|---|
RFLPF20120G9D3T |
Filter, 2012, labelled IoT | 858-878 MHz, low-pass, 0.5 dB, 30 dB at 1716-1756 MHz and 40 dB at 2574-2634 MHz | Match on 868 MHz; mismatch on 915 MHz and on type: a low-pass, so it removes harmonics and does not select the band; not stocked | |
RFLPF16080G9D1T |
Filter, 1608, telecom | 824-915 MHz, low-pass, 0.45 dB, 25 dB at 1648-1830 MHz | Match on 868 and 915 MHz; mismatch on label: telecom 2G/3G/4G, not IoT; a low-pass; not stocked | |
RFBLN20120G9D5T |
Balun, 2012, telecom | 860-960 MHz, 50 to 100 ohm, 1.1 dB | Match on 868 and 915 MHz; mismatch on function: a balun converts balanced to unbalanced, it does not filter; not stocked | |
RFMTA010504NNRB002 |
Metal antenna, 24.77 x 12.68 mm | 863-928 MHz; gain over 1.5 dBi at 863-872 and over 2 dBi at 907-928 MHz | Match on both bands; mismatch on gain: none stated between 872 and 907 MHz; not stocked |
The last column is for your incumbent part. We hold no RF datasheet: of the 28 Walsin datasheets we hold, none covers an RF part or an antenna, so every figure above is from the export.
What do we know about the one antenna that covers both bands?
Only one antenna row covers 863 to 928 MHz, and it states gain in two windows. RFMTA010504NNRB002 is a metal antenna of 24.77 by 12.68 mm with a gain over 1.5 dBi at 863 to 872 MHz and over 2 dBi at 907 to 928 MHz, and a VSWR of 1.5 maximum in the first window and 2.0 in the second; between 872 and 907 MHz the export states neither. It is one of 44 antenna rows, and it is not on our list.
If your radio sits near 868 or 915 MHz the stated windows cover it; if it sits between them the export is silent. Two other antenna rows touch the region, a 840 to 868 MHz dipole and an 880 to 960 MHz metal antenna; neither covers 868 MHz and 915 MHz together. Our post on sub-GHz antenna selection covers the trade-offs.
What will we not tell you about India?
Anything about Indian radio regulation, licensing, customs or import duty. We hold no office, entity or stock in India; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We state no permitted band, power limit, duty, border procedure or transit time, and we give no legal, customs, regulatory or compliance advice; confirm with your compliance team.
We also say nothing about any water meter, utility tender or LoRaWAN design, or whether a Walsin part meets a utility’s specification. Our export contains no price, lead time or stock figure for RF parts, and we publish none.
Why do buyers in India choose Venatech?
Because we say what the data does not show, and then supply the part. Venatech Limited is an authorised Walsin distributor in Hong Kong, which you can confirm with Walsin, and the RF data we work from holds 457 part numbers in 8 families plus 44 antenna, cable and connector rows.
Our free cross-reference tool, VenaMatch, decodes 18 manufacturers’ part numbers and covers 800,000+ crossable parts, and prints match and mismatch fields so the gap is visible before the order. We work from Hong Kong and welcome small lots, which suits a module maker prototyping a sub-GHz radio. The table above is the standard we keep: we tell you the nearest filter is a low-pass, not a band-pass, before you design it in.
How can Venatech help an Indian smart-meter buyer?
Start with the incumbent part number. Paste it into the free cross-reference tool, which decodes 18 manufacturers’ part numbers across 800,000+ crossable parts and lists Walsin candidates with match and mismatch fields, or upload a list to the BOM checker, up to 500 part numbers. The Hong Kong ready-stock list is a dated snapshot, 23 September 2026, never live-synced; none of the 457 RF part numbers is on it. Walsin is the only line we are authorised for; Stackpole and Viking are lines we supply. You can request a quote through the site.
A worked example from our own export: an incumbent 868 MHz harmonic low-pass filter in 2012 maps to RFLPF20120G9D3T, with the band-pass question left open; a 863 to 928 MHz metal antenna maps to RFMTA010504NNRB002, with the 872 to 907 MHz gap stated. Our RF range lists the families. We hold neither ISO 9001 nor IATF 16949. Qualification stays with you.
The short version
For a sub-GHz meter radio, read the filter type before the range. 87 of 457 Walsin RF parts contain 868 MHz, 82 contain 868 and 915, but all 33 filters among them are low-pass and none of the 112 band-pass filters starts below 475 MHz. One metal antenna covers 863 to 928 MHz with a stated gap in the middle, and no RF part is on the Hong Kong ready-stock list as at 23 September 2026.
Send us the filter or antenna from your sub-GHz design and we will return the Walsin parts with every difference stated. Does your radio need the band selected, or only its harmonics removed?
Sources
Fetched 2 November 2026. The mission and radio statements above come from these pages; the part data comes from our own Walsin RF and antenna exports and stock list. – EverythingAboutWater, “Jal Jeevan Mission extended to 2028 with focus on Nal Jal Mitras”, 18 May 2026: https://www.eawater.com/tag/sustainable-water-supply/ – LoRa Alliance blog, “No Wires, No Waste: What the Water in India Conference Revealed About LoRaWAN’s Critical Role in India’s Water Crisis”, 19 August 2026: https://blog.lora-alliance.org/no-wires-no-waste-what-the-water-in-india-conference-revealed-about-lorawans-critical-role-in-indias-water-crisis
Frequently asked questions
Does Walsin list a band-pass filter for 868 MHz?
No. We parsed all 457 RF rows: 33 filters contain 868 MHz and every one is a low-pass filter. None of the 112 band-pass filters does, and the lowest starts at 475 MHz. The nearest IoT-labelled part is the 858 to 878 MHz low-pass RFLPF20120G9D3T.
Why count both 868 and 915 MHz?
The LoRa Alliance page describes the product on both licence-free bands. 82 of 457 RF parts contain both frequencies, but they are cellular antenna switches, couplers, baluns, filters and multiplexers. Which band applies in India is for the regulator, not us.
Which Walsin antenna covers 863 to 928 MHz?
RFMTA010504NNRB002, a metal antenna of 24.77 by 12.68 mm. Gain is over 1.5 dBi at 863 to 872 MHz and over 2 dBi at 907 to 928 MHz. The export states nothing between 872 and 907 MHz. It is not on the Hong Kong list.
Are these RF parts on your Hong Kong shelf?
No. None of the 457 RF part numbers or 44 antenna rows appears on the ready-stock list, a dated snapshot of 23 September 2026 and not live. A Walsin RF line is an enquiry, and we state no price or lead time.
Do you hold a datasheet for these parts?
No. Of the 28 Walsin datasheets we hold, 26 are MLCC and 2 are chip resistor. Every figure here is from the export, so insertion loss, attenuation and gain need checking against Walsin’s own sheet.
Can you advise on Indian radio rules or customs?
No. We hold no office, entity or stock in India and we give no legal, customs or regulatory advice; confirm with your compliance team. We supply Walsin parts from Hong Kong in small lots, and qualification stays with you.