Where Can I buy these 3 antennas ?
https://www.tele.soumu.go.jp/giteki/SearchServlet2?PageID=jt01&ATF=185314002
In Japan, we must use authorized antennas.
You can take a look at the products listed in the following link to see if they meet your requirements.
I wonder where I can buy spring antenna, patch antenna and colinear antenna.
You can search for the antenna you want on the bazaar website to see if you can find one that meets your requirements.Here is the official website link of Bazaar.
thk u ,this is a very good question in this days.
I found the antenna Model.
Again, I want to ask same question.
Where can I buy this model of antenna?
https://www.tele.soumu.go.jp/giteki/SearchServlet2?PageID=jt01&ATF=185316004
PJ 
However, I noticed that EIRP must be less than 16dBm.
For most people, using a 3dBi antenna with a transmit power setting of 13dBm is the most common and practical option.
Therefore, if you could add the following three antennas to your Authorized Antennas, it would be extremely helpful as it would make Meshtastic devices much easier to use.
I would like many people to use Meshtastic, but the antenna issue has not been resolved.
I think Antenna 1 or 2 would be ideal as a compact antenna for carrying around, and Antenna 3 would be ideal as an antenna for a fixed station.
Would there be an additional charge for a certified antenna?
If there is a charge, I would be happy to consider paying that.
By the way, is there a restriction that antennas must be certified overseas? Or is this a restriction that only applies to Japan?
Hi there,
I would agree, The antenna situ is the weak link.
We could use some clearer more concise info on ALL of it
Anyone able to fill in the info ?
LoRa SX1262 Antenna Spec Checklist
1. Frequency Band
- 868 MHz (EU)
- 915 MHz (US / AU)
- 433 MHz (legacy / local law)
(select the band you need)
2. Impedance
- 50 Ω (standard for SX1262 RF front end)
3. VSWR
- ≤ 2:1 across the band (≤ 1.5:1 preferred)
4. Gain
- 2–3 dBi (typical omnidirectional)
- Higher gain (≥ 5 dBi) only if directional coverage is intended
5. Polarization
- Linear, vertical
6. Connector Type
- u.FL / IPEX (direct to module)
- SMA male (with pigtail adapter)
(specify which connector you need)
7. Form Factor
- PCB antenna (compact, low-cost)
- Wire whip
- External whip (SMA)
- Patch / Yagi (gateway, directional)
8. Radiation Pattern
- Omnidirectional for nodes (donut shape)
- Directional for base station / long-range link
this would go a LONG way in solving the mystery 
GL 
PJ 
Hello, I am looking to find authorized antenna information for the Wio-S3/S3N chip. I wanted to know if there is any documentation for an approved wifi chip antenna, lora chip antenna, and a lora spring antenna. We are designing an OEM device and wanted to make sure we use what is allowed for FCC Part 15 in the final design. This device on the lora end will be receive only so it wont transmit. Appreciate any help
I cannot comment on Japan, but having spent 6 years doing cellular in the USA, this is a HUGE official gray-area! One MUST ‘certify’ a cell device with a specific antenna, yet it is nearly impossible to outguess what customers will use. So we’d certify with a tiny (& bit goofy) quarter-wave antenna which we then had to ship TO the customer. The customer who bought a thousand units would complain that they didn’t want 1000 antenna to throw away … but worse, by {cert-body} rules the customer was suppose RE-CERTIFY the module with whichever antenna they actually decided to use (yagi, patch, high-gain, etc)! No one ever did, but that is the ‘rule’.
We always explained to customers that this ‘rule to re-certify’ was primarily the cert-body covering their butt. >IF< their product caused problems with neighbors, it gave teeth to force the customer to modify the ‘offending’ antenna used.
Hi there,
So , FCC part 15 is for interference, has nothing to do with antenna, if your device is one of two categories. If you want to use Chip antenna, look at the NORDIC - NRF91X it’s a master class on antennas and chips ones specifically. They have 3
WiFi, BLE & Cellular. the schematic and board layout is also Opensource… 
Shocking I know, in todays , hide and obfuscate EVERYTHING with AI 
HTH
GL PJ
Seeed has Certs for all there stuff. BTW.
links on the sales page…
here it is