RecipientFilter variable wildcard

Hi guys,

please, is there a way, how can I put variable with wildcard in RecipientFilter?

Example:

$filter = [string]('91*')

New-DynamicDistributionGroup -Name $dg.Name -Alias $dg.Alias -RecipientFilter "Department -like $filter"

This example creates DynDystGroup but without wildcard *:

RecipientFilter : ((Department -like '91') -and (-not(Name -like 'SystemMailbox{*')) -and (-not(Name -like 'CAS_{*')) -and (-not(RecipientTypeDetailsValue -eq 'MailboxPlan')) -and
                  (-not(RecipientTypeDetailsValue -eq 'DiscoveryMailbox')) -and (-not(RecipientTypeDetailsValue -eq 'PublicFolderMailbox')) -and (-not(RecipientTypeDetailsValue -eq
                  'ArbitrationMailbox')))

Thank you very much,

Lukas