Walsin Antenna Specification Fields for Dutch Designers: 4 of 10 Are Filled on All 44 Parts

We counted every cell in Walsin’s antenna export. Of the 10 Walsin antenna specification fields published, only 4 are filled on all 44 part numbers. Two fields are filled on 2 rows each. And 7 of the 44 parts are indistinguishable from each other on every published field but the part number itself.

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Venatech Limited, an authorised Walsin distributor in Hong Kong, holds Walsin_Antenna_ALL.xlsx and its twin Walsin_Antenna_FRESH.xlsx from Walsin Technology (Walsin) — 44 rows, 10 columns, the entire published antenna line. We hold zero datasheets for it. So we did the only honest thing available: we measured how much the published data can actually narrow a choice. Every part number below is real, and every figure is our own count of the export as at 12 October 2026.

Which of the 10 published Walsin antenna fields are filled on all 44 parts?

Four: Part Number, Series, Working Frequency Range and Dimension. We read all 440 cells. The other six are blank somewhere, and two of them are blank almost everywhere — Inductance Value and Resistance Value carry a value on 2 rows each, both of them non-radiating parts.

Column	Filled on	Distinct values	Blank on
Part Number	44 of 44	44	0
Series	44 of 44	10	0
Working Frequency Range	44 of 44	22	0
Dimension	44 of 44	35	0
Peak Gain	36 of 44	15	8
Voltage Standing Wave Ratio	36 of 44	5	8
Connector 1	28 of 44	7	16
Connector 2	6 of 44	4	38
Inductance Value	2 of 44	2	42
Resistance Value	2 of 44	2	42

The two inductance and resistance rows are RFNFC355500NNNB001, a 13.56 MHz NFC antenna at 2.44~2.98 μH, and RFWPC483246NNPBC01, a 100 KHz wireless-power coil at 12.2 ± 20% μH and 330 mΩ MAX. Those two columns exist for two parts and are dead weight on the other 42. A selector that offers inductance as a filter will return two results for every query.

How many of the 946 part pairs does each field actually separate?

44 parts make 946 distinct pairs, and we tested every column against all of them. For each pair we asked whether that column holds two different non-blank values. Dimension separates 935 of 946 pairs. Voltage Standing Wave Ratio separates 134. Inductance Value and Resistance Value each separate exactly 1 pair of 946. We have not seen this counted anywhere.

Column	Pairs separated, of 946	Share of all pairs
Part Number	946	100%
Dimension	935	98.8%
Working Frequency Range	871	92.1%
Series	819	86.6%
Peak Gain	556	58.8%
Connector 1	272	28.8%
Voltage Standing Wave Ratio	134	14.2%
Connector 2	12	1.3%
Inductance Value	1	0.1%
Resistance Value	1	0.1%

Three columns do nearly all the work — dimension, band and series — and all three are things you already know from your mechanical envelope and your radio. The fields that describe antenna performance are the weak ones: peak gain separates 556 pairs, and the only impedance-match figure in the file separates 134.

Does the Voltage Standing Wave Ratio column narrow a choice at all?

Barely. It is filled on 36 of 44 rows and reads exactly 2.0 (max.) on 32 of those 36. Four rows carry anything else: 2.1 (max.) on RFECA3216060A1T, 2.5 (max.) on RFMTA060206NNBB002, and two rows that state VSWR per sub-band rather than as one figure. So the column holds five distinct strings over 44 parts.

A field that gives the same answer on 32 of 36 populated rows is not a selector. It is a house limit written once and repeated. We are not saying the figure is wrong — we hold no datasheet to check it against, and it is entirely plausible that Walsin specifies 2.0 max across the line. We are saying it cannot be used to choose between parts, and a tool that offers it as a filter is offering you a control that does nothing.

Which Walsin antenna part numbers are indistinguishable on every published field?

Seven of 44, in three groups. We built a signature from all nine non-part-number columns for every row, with runs of whitespace collapsed, and counted distinct signatures: 44 part numbers produce 40 signatures. Three signatures are shared.

Group	Part numbers	What the export says differs
1	RFANT3216120A1T, RFANT3216120A3T, RFANT3216120A5T	Nothing. All nine published fields are identical.
2	RFANT5220110A0T, RFANT5220110A2T	Nothing. All nine published fields are identical.
3	RFANT6050110L0T, RFANT6050110L1T	Two space characters inside one string.

These are not three ways of saying the same part. A manufacturer does not issue three order codes for one product. Something real differs between RFANT3216120A1T, RFANT3216120A3T and RFANT3216120A5T — most likely a tuned centre frequency, a matching variant or a feed arrangement — and none of it reaches the published data. Put the shelf next to its nearest neighbour and the gap is obvious.

Field	RFANT3216120A1T	RFANT3216120A3T	RFECA3216060A1T	Your incumbent part	Match / mismatch
Series	Chip Antenna (BT, Wifi BAND)	Chip Antenna (BT, Wifi BAND)	Chip Antenna (BT, Wifi BAND)	______	Match across all three
Working frequency range	2.4~2.5 GHz	2.4~2.5 GHz	2.4~2.5 GHz	______	Match across all three
Dimension	3.2mm x 1.6mm x 1.2mm	3.2mm x 1.6mm x 1.2mm	3.2mm x 1.6mm x 0.6mm	______	Mismatch — 1.2 mm against 0.6 mm height, half the profile
Peak gain	2 dBi	2 dBi	2 dBi	______	Match on the published figure
Voltage standing wave ratio	2.0 (max.)	2.0 (max.)	2.1 (max.)	______	Mismatch — the only three-way difference in this column
Connector	blank	blank	blank	______	Mismatch against any connectorised incumbent
Inductance / resistance	blank	blank	blank	______	Mismatch — not published for any chip antenna
Datasheet held by Venatech	none	none	none	______	Mismatch against any incumbent you hold a datasheet for
Difference between A1T and A3T	—	—	—	______	Mismatch of record — no published field separates them

We will not tell you a part is equivalent. We will show you where it differs — and on this family the honest answer is that we cannot show you, because Walsin publishes nothing that separates them. Saying so is more use to you than a confident guess.

What separates RFANT6050110L0T from RFANT6050110L1T?

Two space characters. Both are 5.9mm x 5.1mm x 1.1mm dual-band chip antennas at 4 dBi and 2.0 (max.) VSWR. The only cell in which they differ is Working Frequency Range: one string is 49 characters long, the other 51, and the difference is the run of spaces padding between 2.4~2.5 GHz and 4.9~5.9 GHz. Collapse whitespace and the two rows are identical.

That is a scripting hazard as much as a selection problem. A grouping query on the raw string treats these as two different bands: GROUP BY on the frequency column returns 22 distinct values across 44 rows, and normalising whitespace returns fewer. The same applies to Peak Gain, where four rows state gain per sub-band inside one cell with embedded newlines.

Which fields would a Dutch design review need, and are they in the export?

Six fields decide a chip antenna, and the export carries two of them cleanly — a figure we have published before and which this census reproduces. Missing entirely: ground-plane requirement, keep-out area, matching network, efficiency, radiation pattern, operating temperature and recommended land pattern. No column exists for any of them in the 10 we hold.

What is in the file is a mechanical envelope, a band, a series name, one gain figure and one VSWR limit. What is not in the file is everything that determines whether the antenna works on your board, and a chip antenna is more board-dependent than almost any other passive part.

Of the 44 rows, only 12 are chip antennas. The rest are 7 dipole antennas with N or SMA connectors, 6 cable-terminated dipoles, 6 PCB antennas, 3 FPC antennas, 3 cable assemblies, 3 connectors, 2 metal antennas, 1 NFC coil and 1 wireless-power coil. Three of the 44 rows are not antennas at all.

What documentation does Venatech hold for the 44 antenna part numbers?

Nothing. We hold 28 Walsin datasheets, 451 pages, covering 26 MLCC series and 2 chip resistor series, sent on request. Zero pages cover antenna, and zero cover the 457-part RF line beside it. Across our catalogue, 84.2% of 359,135 part numbers have no datasheet; antenna’s 44 and RF’s 457 are both at zero.

Also absent from those 451 pages: REACH, SVHC, conflict minerals, PFAS, Prop 65, China RoHS, ISO 9001, IATF 16949, ISO 14001, PPAP, IMDS, VDA, a qualification report, a Declaration of Conformity, a CoC template, CE or UKCA, a PCN policy and a counterfeit policy. Every one is not in the documents we hold — a different statement from saying Walsin does not have it. All are on our request list.

What we do supply: lot and date-code traceability, a certificate of conformity per shipment on request, original sealed Walsin packaging, and an authorised distributor relationship you can confirm with Walsin directly. Unit 207, 2/F, Sun Ling Plaza, 30 On Kui Street, Fanling, N.T., Hong Kong. (852) 2628 4777.

What should a Dutch designer do before specifying a Walsin antenna?

Ask Walsin, in writing, what separates the parts the export cannot separate. That is a one-line question with three real part numbers attached to it, and it is the only way to resolve Group 1. Then do the two things the data can help with.

1. Cross the rest of the bill of materials while you wait. Paste up to 500 part numbers or drop your Excel or CSV into the free cross-reference tool, filter by commercial or automotive grade, and read every stated difference rather than a claimed match.
2. Check what is physically in Hong Kong on ready stock — a dated snapshot as at 23 September 2026 covering 1,125 part numbers, never a live feed. Antenna has zero representation in that snapshot, so plan this line on lead time.

For the 2.4 GHz selection problem specifically, see choosing a 2.4 GHz chip antenna; for the matching components behind the feed, high Q and low ESR MLCC for RF. The full line is on the Walsin antenna page.

The short version

We counted every cell in the 44-row Walsin antenna export. Only 4 of 10 published fields are filled on all 44 parts. Across the 946 possible part pairs, Dimension separates 935, Voltage Standing Wave Ratio separates 134, and Inductance Value and Resistance Value separate exactly 1 each. The VSWR column reads 2.0 (max.) on 32 of its 36 populated rows. 44 part numbers produce only 40 distinct specification signatures, so 7 parts fall into three indistinguishable groups — and one of those groups is separated only by two space characters. Three of the 44 rows are connectors, not antennas. We hold no datasheet for any of them. Qualification stays with you.

Send us the antenna part numbers you are weighing up and we will tell you exactly which published fields separate them and which do not — then put the same question to Walsin in writing on your behalf. And if your selector let you filter on inductance value, what did it think the other 42 parts were?

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Frequently asked questions

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