I am trying to work a 700mhz LTE signal with a DB2 uhf bowtie television antenna. I find the cellular signal to be horizontally polarized. Can the bowties simply be twisted 45 degrees in both directions to obtain the correct polarity, or will the difference in element spacing defeat the attempt?
Welcome to HamSE, Gary, and thanks for an interesting question.
We should be grateful to Russel Renaud, VA3RR, for posting his NEC2 simulation model of the DB2 antenna. Importing the model to the 4NEC2 simulator, we find that the antenna pattern is primarily horizontally polarized:
Assuming the antenna is "in the clear" - that is, no other conductive structures are present to affect the situation - simply rotate the entire antenna to achieve a different angle of polarization.
As you surmise, twisting only the elements will very probably disturb the overall pattern and the impedance of the antenna.