Part Audit Review
Worked for 4 mins 6 sec
Created a project doc
Audit complete. I added the official TE Connectivity datasheet URL and documented the specifications and discrepancies in Part Audit — TE Connectivity 2118900-1.
Key flags: pin 2 is incorrectly typed as Power In instead of ground, pin descriptions/package metadata are missing, and the footprint lacks the manufacturer’s RF keepout and matching-network guidance; its exact symmetric pad coordinates also need drawing-based verification before production.
Add pins for the mounts, S1 and S2
Thought for 12 sec
I’ll add two schematic terminals mapped to footprint pads S1 and S2, classify them as mechanical/passive mounts, and verify all four pad mappings.
Worked for 3 mins 50 sec
Added and verified mount pins S1 and S2. Both are passive, grouped under Mounts, described as mechanical mounting solder pads, and map directly to the existing S1/S2 footprint pads.
Fix metadata and pins
Fix pin 2
Verify footprint geometry
Add RF keepout
Refine this doc
Ask about this doc
Part Audit — TE Connectivity 2118900-1
Audit result
Manufacturer: TE Connectivity
MPN: 2118900-1
Official function: Passive SMT GNSS/GPS antenna
Status: Active
Datasheet property: Updated to the official TE Connectivity
MPN: 2118900-1
Official function: Passive SMT GNSS/GPS antenna
Status: Active
Datasheet property: Updated to the official TE Connectivity
2118900-DS PDF.Official references:
- TE product page
- Official datasheet — 2118900-DS
- Official customer drawing — C-2118900 Rev A
- Official product specification — 108-61420
Current part information found
Table
| Field | Current value | Audit |
|---|---|---|
| Manufacturer Name | TE Connectivity | Correct |
| Manufacturer Part Number | 2118900-1 | Correct |
| Designator Prefix | E | Acceptable for an antenna, though AE is also commonly used |
| Description | 2118900-1 A Manufacturer Recommendations 1.0 mm TE Connectivity | Incomplete/unclear; does not identify the part as a GNSS antenna |
| Datasheet URL | Initially missing; now official TE URL | Corrected |
| Package metadata | Not set | Missing; should describe 10 × 10 × 1 mm SMT antenna |
| Explicit pin-count metadata | Not set | Missing; part has 2 electrical terminals plus 2 fixed/mechanical solder pads |
| 3D model | 2118900-1.step | Present |
| Footprint asset | XDCR_2118900-1.kicad_mod | Present |
Key manufacturer specifications
Table
| Parameter | Manufacturer value |
|---|---|
| Frequency range | 1560–1602 MHz |
| Antenna operation | Passive |
| Nominal impedance | 50 Ω |
| VSWR | < 2.0:1 |
| Maximum gain | 3.5 dB |
| Polarization | Linear |
| Radiation pattern | Omnidirectional in azimuth |
| Power handling | 3 W CW |
| Operating temperature | −40 °C to +85 °C |
| Storage temperature | −40 °C to +85 °C |
| Body dimensions | 10.0 × 10.0 × 1.0 mm |
| Weight | < 0.5 g |
| Mounting | SMT, tape and reel |
| Reflow qualification | 250 °C peak |
| Construction | FR4 antenna element, ENIG/Au over Ni contact finish |
Manufacturer performance is dependent on PCB ground-plane size and placement. TE characterizes the antenna using a 100 mm ground size and requires the mounting guide, top-layer ground arrangement, RF matching area, and no-copper region to be followed.
Schematic-symbol cross-check
The current symbol exposes two electrical terminals:
Table
| Symbol pin | Current type | Datasheet function | Result |
|---|---|---|---|
| 1 | Passive | RF feed / signal | Functionally plausible, but missing a pin name/description such as FEED — 50 Ω RF input/output |
| 2 | Power In | Ground | Mismatch: Power In is not appropriate for a passive antenna ground terminal; it should be identified as Ground, with a clear pin description |
Additional symbol findings:
- Both terminals are displayed as generic
Terminalsymbols with undefined pin names. - No
Pin Descriptionvalues are present. - The symbol does not communicate that this is a two-terminal passive RF antenna.
- A stale semantic index referenced a third terminal, but the current structured schematic contains only two terminals. The current structured data is the source of truth.
Footprint cross-check
Current footprint source geometry:
Table
| Feature | Current footprint |
|---|---|
| Body/fabrication outline | 10.0 × 10.0 mm |
| Courtyard | 10.5 × 10.5 mm |
| Electrical pad 1 | 1.0 × 1.0 mm at (+4.2, +4.2) |
| Electrical pad 2 | 1.0 × 1.0 mm at (−4.2, +4.2) |
| Fixed pad S1 | 1.5 × 1.5 mm at (−3.95, −3.95) |
| Fixed pad S2 | 1.5 × 1.5 mm at (+3.95, −3.95) |
| Pin-1 marker | Present near pad 1 |
| Paste/mask | Copper, mask, and paste on all four pads |
Footprint assessment
- Correct: Four physical solder lands are represented: two electrical terminals and two fixed/mechanical pads.
- Correct: Nominal 10 × 10 mm body and 1.0/1.5 mm land classes agree broadly with the TE package/mounting information.
- Correct: Electrical pads are mapped only to pins 1 and 2; the two
Spads are treated as mechanical mounts rather than schematic terminals. - Needs source-level confirmation: The imported footprint uses symmetric pad centers. TE’s mounting guide must be treated as authoritative for exact asymmetric offsets and orientation. The footprint should be dimensionally rechecked directly against the drawing before production release.
- Mismatch / missing layout guidance: The footprint does not encode the datasheet’s antenna keepout/no-copper region, top-layer ground boundary, no-soldermask RF matching area, or recommended series/shunt matching-component region. These omissions can materially reduce antenna performance if the user treats the footprint alone as sufficient placement guidance.
- Orientation risk: The pin-1 marker and feed/ground mapping must be checked against the TE top/bottom-view convention when the footprint is placed. The datasheet identifies one terminal as feed and the other as ground; the current generic pin metadata does not make that mapping obvious.
Pin-description assessment
No pin descriptions are currently set. Recommended descriptions:
Table
| Pin | Recommended name | Recommended description | Recommended type |
|---|---|---|---|
| 1 | FEED | 50 Ω RF feed/signal terminal; connect through the application-specific matching network | Passive |
| 2 | GND | Antenna ground terminal; connect to the recommended top-layer PCB ground geometry | Ground |
The two fixed pads should remain non-electrical mechanical footprint pads and should not be added as schematic pins unless TE explicitly defines an electrical role for them.
Mismatches and risks requiring attention
- Pin 2 electrical type is wrong: currently
Power In; datasheet function is antenna ground. - Pin descriptions are absent: feed and ground are not identified in the symbol.
- Part description is incomplete: it should identify a passive 1560–1602 MHz GNSS SMT antenna.
- Package metadata is missing: 10 × 10 × 1 mm SMT antenna package is not recorded as a property.
- Pin-count metadata is missing: two electrical terminals plus two fixed/mechanical solder pads.
- RF layout constraints are not embedded in the footprint: no-copper keepout, top-layer ground arrangement, matching network, and soldermask guidance must be added at board level or included in an improved footprint.
- Exact land coordinates need a final drawing-based dimensional check: the current imported footprint is symmetric, while the manufacturer mounting guide should control production geometry.
Recommended correction priority
- Correct pin 2 from
Power Into Ground and add FEED/GND pin descriptions. - Replace the description with a clear GNSS antenna description and add package metadata.
- Perform a direct dimensional footprint verification against the official mounting-guide drawing.
- Add or document the required RF keepout, ground boundary, and matching-network placement constraints before using the part in a PCB design.
Audit result
Current part information found
Key manufacturer specifications
Schematic-symbol cross-check
Footprint cross-check
Footprint assessment
Pin-description assessment
Mismatches and risks requiring attention
Recommended correction priority
