/diy/ - Do It Yourself

I need a better HT omni whip, guys. rocking a UV-5X3 triband 2m/1.25m/70cm which accepts antennas with SMA-Female connectors.

Abbree
https://www.amazon.com/dp/B07STB8BD6/ref=twister_B07RQLDZS2?_encoding=UTF8&th=1 42.5", 5dBi, $21.50 @ amzn

Btech
https://baofengtech.com/nagoya-na-320a 17.7", 2.15dBi, $17.99 @ amzn(bought this already, barely an improvement over the stock antennas)

Comet Antenna
http://www.cometantenna.com/amateur-radio/ht-antennas/chinese-ht-antennas/ SMA-24J 15.75", 2.15dBi on 2m, 3.5dBi on 70cm, $24.95+tax @ HRO.

Diamond Antenna
https://www.diamondantenna.net/srj77ca.html 15", 6dBi, $24.95+tax @ HRO
https://www.diamondantenna.net/srjf40.html 16", 6dBi, $26.95+tax @ HRO

im starting to think i need to buy some male/female reverse/standard bnc/sma adapters to open up my options a bit.
pic related, is it just a thin wire going up the middle? because otherwise the radiation pattern is going to be retarded with that shape, right?