[求助]What's the relation between antenna length and resonating frequency?

dear friends COc t d  
I want to know what's the relation between the antenna length and resonating frequency TsF>Y""*M  
how can we determine the resonance frequency without any simulation or measurement just by looking at antenna dimension? UfSqiu  
i.e in this antenna with this dimensions, do you know what is the resonating frequency? ',bSJ4)Y  
Is there any equation for this? Op5S
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thanks all. tl"?AQcBR  
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I don't think there is a specific relation between the antenna length and resonating frequency. 0k G\9  
generally, antennas with large dimensions have small resonating frequency. "\+.S]~  
moreover, one antenna can have more than one resonating frequency, for example, broadband antennas. C7FxV2  
If there really exists a specific relation, I also want to know.  k`w/  

Dear zh_george CW2)1%1iz  
I read this issue in a book that: l))Q/8H  
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"The length of the spiral radiator is determined for the antenna to resonate at the desired frequency (402–405 MHz) in the FDTD 3I(;c ,S  
geometry and the coaxial feed is located for a good 50  match." [2Zl '+  
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this antenna must be resonating in about 400MHz but what's the relation between the length of radiator and AVm+ 1  
the resonating frequency?! ]T'7+5w  
I'm so confused!

I don't know how to analyse the antenna. KWZhCS?[(  
Maybe you can get some information from the current distribution on the radiator.

The current distribution is something like this: > S>*JP  
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and the E-field is like this but what we find from these?