Chip Antenna Selection: 14 of Walsin’s 19 Antenna Bands Hold Exactly One Part

Chip antenna selection in Walsin Technology’s 38-antenna export comes down to one crowded band and many empty-handed ones. We counted every row: 14 of 19 distinct bands hold exactly one part number, and a single band holds 15 of the 38.

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Venatech Limited, an authorised Walsin distributor in Hong Kong, holds Walsin Technology (Walsin)’s full antenna parametric export — 44 rows, Walsin_Antenna_ALL.xlsx — and no Walsin antenna datasheet of any kind. Every part number below is real, checked against that export, and every count is of part numbers, not pieces. Six of the 44 rows are cable assemblies and connectors rather than antennas, which is an established finding of ours and already published; what follows is a fresh measurement of the remaining 38, built specifically around the band column.

How many real bands does Walsin’s antenna export actually cover?

Nineteen, once the column’s own whitespace is normalised. We parsed the Working Frequency Range cell on all 38 antenna rows and stripped every space from each string before counting distinct values: 19 bands survive. Read the column as Walsin prints it, with the original spacing intact, and it looks like 21 bands — two of those 21 are the identical dual-band entry typed with a different number of internal spaces. That is the band ladder.

Band (normalised)	Part numbers	Families represented	Footprint range (L × W, mm²)
2.4~2.5 GHz	15	Chip, PCB, FPC, Dipole (cable)	5.12 – 2,688
2.4~2.5 / 5.15~5.85 GHz	3	Dipole (cable), PCB	356.9 – 2,688
2.4~2.5 GHz + 4.9~5.9 GHz (dual, one cell)	2	Chip	30.09 – 30.09
2.4 GHz (bare)	2	Dipole (N, SMA), PCB	500 – 2,555.8
5.x GHz (bare)	2	Dipole (cable), PCB	201 – 2,688
14 further bands, one part each	14	Dipole, PCB, FPC, Metal, NFC, WPC	226.9 – 2,555.8

We have not seen this counted anywhere: 14 of the 19 real bands in Walsin’s antenna range hold exactly one orderable part number. A chip antenna selection exercise that starts from “what bands does Walsin cover” is really a question about one crowded shelf and fourteen single-SKU shelves.

Which band holds the most parts, and why does the column write it twice?

Fifteen of 38, written as the single string 2.4~2.5 GHz. That one band — no dual-band suffix, no bound, no slash — accounts for 39.5% of every real antenna in the range, spanning four families: all but one chip antenna, two FPC antennas, two PCB antennas, and one cable dipole.

The dual-band chip pair, RFANT6050110L0T and RFANT6050110L1T, covers 2.4~2.5 GHz plus 4.9~5.9 GHz, and Walsin’s export writes that band twice with two different amounts of internal whitespace between the two frequency ranges — 2.4~2.5 GHz followed by 27 spaces on one row and 29 on the other, then 4.9~5.9 GHz. Read literally as two separate strings, that is 2 of our 21 raw band values before normalisation. Collapse the whitespace and they become one band, held by 2 parts — which is also where the ladder’s count of 19 comes from rather than 21.

Which 14 bands get exactly one Walsin antenna, and what does that mean for sourcing?

It means there is no second candidate to compare against inside the catalogue. We grouped all 38 rows by normalised band and isolated every group of size one: 433 MHz, 700 ± 50 MHz, 840~868 MHz, 850/1900/2100 MHz, 863~928 MHz, 880~960 MHz, 1.575 GHz, 1559~1609 MHz, 1565~1606 MHz, 2.4~2.55 GHz, the stacked 2.4~2.5/5.15~5.85 GHz write-up, 2.4/5.x GHz, 13.56 MHz and 100 kHz.

Band	Part number	Family	Peak gain as published
433 MHz	RFDPA131000SBUB802	Dipole (N, SMA)	> 1 dBi
700 ± 50 MHz	RFDPA660900SMTB801	Dipole (N, SMA)	2 dBi
840~868 MHz	RFDPA191300SMBB801	Dipole (N, SMA)	> 1 dBi
863~928 MHz	RFMTA010504NNRB002	Metal	> 1.5 / > 2 dBi by sub-band
880~960 MHz	RFMTA060206NNBB002	Metal	> 1 dBi
1.575 GHz	RFDPA870900SBGB801	Dipole (N, SMA)	0.44 dBi
13.56 MHz	RFNFC355500NNNB001	NFC	not specified
100 kHz	RFWPC483246NNPBC01	WPC	not specified

For a one-part band, there is nothing in Walsin’s own catalogue to cross it against — the comparison has to come from outside the file, against a datasheet Venatech does not hold for any of these parts. We will not tell you a part is equivalent to anything. We will show you where it differs, field by field, against the one row that exists.

Does a bigger antenna footprint buy more band coverage?

No, and we measured it directly. We computed L × W in square millimetres for all 38 antenna rows: the smallest is 5.12 mm² (the 3.2 × 1.6 mm chip antennas) and the largest is 2,688 mm² (the 192 × 14 mm cable dipoles) — a 525-to-1 spread — and the largest parts sit in the same crowded 2.4~2.5 GHz band as the smallest ones, not in a wider band.

Part number	Family	Dimension	Area (mm²)	Band
RFANT3216120A1T	Chip	3.2 × 1.6 × 1.2 mm	5.12	2.4~2.5 GHz
RFANT6050110L0T	Chip (dual)	5.9 × 5.1 × 1.1 mm	30.09	2.4~2.5 + 4.9~5.9 GHz
RGFRA9937380A3T	Chip	9.9 × 3.7 × 3.8 mm	36.63	2.4~2.55 GHz
RFMTA060206NNBB002	Metal	36.6 × Ø6.2 × Ø0.8 mm	226.92	880~960 MHz
RFPCA500609IMAB301	PCB	50 × 6.2 × 3 mm	310.0	2.4~2.5 GHz
RFDPA151414IMLB902	Dipole (cable)	192 × 14 × 21.4 mm	2,688.0	2.4~2.5 / 5.15~5.85 GHz

Size buys gain headroom and bandwidth margin inside a band, not access to a new one. The physics is covered at series level in choosing a 2.4 GHz chip antenna; what we add here is the area figure itself, which neither post stated before.

What happens if a script strips whitespace from the band column without checking it?

It merges two different-looking rows into one unreadable token. We ran the obvious cleaning step — collapse all whitespace in Working Frequency Range — on the dual-band chip rows and got 2.4~2.5GHz4.9~5.9GHz: two valid bands run together with no separator at all, because the only thing separating them in Walsin’s own cell was whitespace, and whitespace is exactly what a naive cleaning pass removes first.

That is a genuine landmine for anyone building a filter against this file: a numeric or regex match against that merged string will not resolve to either 2.4 GHz or 4.9 GHz cleanly. The fix is to detect a multi-band cell before stripping, not after — split on a real delimiter, then normalise each half separately.

Can a one-part band at 868 MHz be covered by a solder-mount antenna?

Only by one of two parts, and only one of them actually solders to the board with no external connector. We set the requirement as “868 MHz coverage, no SMA jack, no IPEX pigtail” and checked Walsin’s own Connector 1 field against all four plausible candidates.

Part number	Band as published	Connector 1 field	Match / mismatch vs “868 MHz, no connector”
RFMTA010504NNRB002	863~928 MHz	blank (bare lead)	Match on mount and band — but gain is published only for 863–872 MHz and 907–928 MHz, not the 35 MHz between
RFMTA060206NNBB002	880~960 MHz	blank (bare lead)	Match on mount — mismatch on band, starts 12 MHz above 868 MHz
RFDPA191300SMBB801	840~868 MHz	SMA	Match on band — mismatch on mount, needs an SMA bulkhead jack in the enclosure
RFANT3216120A1T	2.4~2.5 GHz	blank (bare, chip)	Match on mount — mismatch on band entirely

One part, RFMTA010504NNRB002, matches both conditions, and it is the only one of the four. Confirm its gain and VSWR against Walsin’s own datasheet before design-in — we hold none for this line and say so rather than paraphrase a figure we cannot see.

The short version

Walsin’s antenna export holds 38 real antennas once the six cable assemblies and connectors are excluded, and those 38 cover 19 distinct bands once the column’s own whitespace is normalised — not the 21 a literal read suggests. Fourteen of those 19 bands hold exactly one part number. One band, 2.4~2.5 GHz, holds 15 of the 38 and spans a 525-to-1 footprint spread with no corresponding gain advantage. Strip whitespace from the band column before checking for a multi-band cell, or two valid bands merge into one unreadable token.

Send us the band your design needs and whether it has to solder directly to the board, and we will tell you — honestly — whether you are choosing from fifteen parts or from one. Cross your whole BOM in one pass, and check ready stock for what is physically in Hong Kong as at 23 September 2026 before committing to a production slot. Qualification stays with you.

For the sub-GHz side of this same 38-part range, see sub-GHz antenna selection outside the 2.4 GHz chip antenna range. The full line is on the Walsin antenna range page.

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Frequently asked questions

<!– wp:rank-math/faq-block {"questions":[{"id":"faq-question-01","title":"How many bands does Walsin's antenna export actually cover?","content":"Nineteen, once whitespace in the Working Frequency Range column is normalised across all 38 real antenna rows. Read literally with Walsin’s own spacing intact, the column shows 21 distinct strings, because one dual-band entry is typed with two different amounts of internal whitespace across two part numbers.”,”visible”:true},{“id”:”faq-question-02″,”title”:”Which band has the most Walsin antennas?”,”content”:”2.4~2.5 GHz, written as a single plain string with no bound or slash. It holds 15 of the 38 real antennas — almost 40% — across four families: chip, PCB, FPC and one cable dipole, with footprints ranging from 5.12 mm² to 2,688 mm².”,”visible”:true},{“id”:”faq-question-03″,”title”:”How many bands have only one antenna part number?”,”content”:”Fourteen of the 19 real bands. They include 433 MHz, 700 ± 50 MHz, 840~868 MHz, 863~928 MHz, 880~960 MHz, 1.575 GHz, 13.56 MHz and 100 kHz, each served by exactly one part in the entire export.”,”visible”:true},{“id”:”faq-question-04″,”title”:”Does a larger antenna footprint cover a wider band?”,”content”:”No. We measured the footprint area of all 38 antennas: the range runs from 5.12 mm² to 2,688 mm², a 525-to-1 spread, and the largest parts sit in the same 2.4~2.5 GHz band as the smallest chip antennas rather than in a different one. Size buys gain headroom and margin, not band access.”,”visible”:true},{“id”:”faq-question-05″,”title”:”Is there a Walsin chip antenna for 868 MHz?”,”content”:”No. None of Walsin’s 12 chip antennas is specified below 2.4 GHz. Coverage at 868 MHz comes from the metal antenna and dipole families instead — specifically RFMTA010504NNRB002, 863~928 MHz, which is the only part in the range that both covers the band and mounts without an external connector.”,”visible”:true},{“id”:”faq-question-06″,”title”:”Does Venatech hold a Walsin antenna datasheet?”,”content”:”No, for any part in the range. Every figure in this post is read from Walsin’s parametric export, Walsin_Antenna_ALL.xlsx, and must be confirmed against Walsin’s own documentation before design-in. We say this plainly rather than implying coverage we do not have.”,”visible”:true}],”listStyle”:””,”titleWrapper”:”h3″,”titleCssClasses”:””,”contentCssClasses”:””,”sizeSlug”:””} –>

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