Normal ones I'd guess, no bars on them or anything like that?
Are your windows near the ceiling, several feet (maybe) above where you have your scanner? (And they are at or slightly above ground level?)
I have not used this antenna, but if you can get at least above ground level (at the window) it might work.
Buy Bingfu VHF UHF Car Truck Police Scanner Adhesive Mount Antenna Vehicle Ham Radio Amateur Radio Mobile Scanner BNC Male Dipole Antenna Compatible with Uniden Bearcat Whistler Radio Shack Radio Scanner: Radio Antennas - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Fakespot gives the posted reviews an A (not deceptive)
Here's two more along the same line:
Buy HARULU Scanner Antenna For Uniden Motorola Car Radio BNC Mount 4" Mobile Full Band: Radio Antennas - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Fakespot gives the posted reviews an A (not deceptive)
and
Amazon.com: Scanner Radio Receiver BNC Glass Mount Wire Antenna with 2 Suction Cups - Workman SC1: Home Audio & Theater
www.amazon.com
Fakespot gives the posted reviews an A (not deceptive)
This appears to be similar to one on ScannerMaster's site:
In-Car Mobile Antenna with SMA
www.scannermaster.com
But the one on ScannerMaster is SMA, not the BNC you need (the Amazon one is BNC), and the price on Amazon is about half ot the cost on ScannerMaster's page.
These are pretty cheap. If you want to stick with a "back of the set" telescoping antenna, try the
Diamond RH789.